Space Shuttle Columbia disaster

<h2 id="background">Background</h2>
<h3>Space Shuttle</h3>
Main article: <a href="/facts/Space_Shuttle/7BoyetEv">Space Shuttle</a>

The <a href="/facts/Space_Shuttle/7BoyetEv">Space Shuttle</a> was a partially reusable spacecraft operated by the U.S. <a href="/facts/NASA/TIMCV0yV">National Aeronautics and Space Administration</a> (NASA).<a class="footnote-ref" id="fnref:1" href="#fn:1">1</a>: 5, 195  It <a href="/facts/STS-1/DLnJNV3G">flew in space for the first time</a> in April 1981,<a class="footnote-ref" id="fnref:2" href="#fn:2">2</a>: III-24  and was used to conduct in-orbit research,<a class="footnote-ref" id="fnref:3" href="#fn:3">3</a>: III-188  and deploy commercial, military, and scientific payloads.<a class="footnote-ref" id="fnref:4" href="#fn:4">4</a>: III-66, 68, 148  At launch, it consisted of the <a href="/facts/Space_Shuttle_orbiter/pD50Txk9">orbiter</a>, which contained the <a href="/facts/List_of_Space_Shuttle_crews/bMRPgInJ">crew</a> and payload, the <a href="/facts/Space_Shuttle_external_tank/RApJkcAq">external tank</a> (ET), and the two <a href="/facts/Space_Shuttle_Solid_Rocket_Booster/ETayF0Xh">solid rocket boosters</a> (SRBs).<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a>: 363  The orbiter was a reusable, winged vehicle that launched vertically and landed as a glider.<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a>: II-1  Five operational orbiters were built during the <a href="/facts/Space_Shuttle_program/6Ikdvwsw">Space Shuttle program</a>.<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>: 5  <a href="/facts/Space_Shuttle_Columbia/uF51RXWM">Columbia</a> was the first space-rated orbiter constructed, following the atmospheric test vehicle <a href="/facts/Space_Shuttle_Enterprise/HhtH1PfY">Enterprise</a>. The orbiter contained the crew compartment, where the crew predominantly lived and worked throughout a mission.<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a>: II-5  Three <a href="/facts/Space_Shuttle_main_engines/vGkj6Vxm">Space Shuttle main engines</a> (SSMEs) were mounted at the aft end of the orbiter and provided thrust during launch.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a>: II-170  Once in space, the crew maneuvered using the two smaller, aft-mounted <a href="/facts/Orbital_Maneuvering_System/r2fyByAg">Orbital Maneuvering System</a> (OMS) engines.<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>: II-79 
The orbiter was protected from heat during reentry by the <a href="/facts/Thermal_protection_system/p7TMk9sa">thermal protection system</a> (TPS), a <a href="/facts/Atmospheric_entry/p7TMk9sa">thermal soaking</a> protective layer around the orbiter. In contrast with previous US spacecraft, which had used ablative heat shields, the reusability of the orbiter required a multi-use heat shield.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a>: 72–73  During reentry, the TPS experienced temperatures up to 1,600 °C (3,000 °F), but had to keep the orbiter vehicle's aluminum skin temperature below 180 °C (350 °F). The TPS primarily consisted of four sub-systems. The nose cone and leading edges of the wings experienced temperatures above 1,300 °C (2,300 °F), and were protected by the composite material <a href="/facts/Reinforced_carbon%25E2%2580%2593carbon/hDRQD3W2">reinforced carbon–carbon</a> (RCC). Thicker RCC was developed and installed in 1998 to prevent damage from <a href="/facts/Space_debris/X7YSKlXl">micrometeoroid and orbital debris</a>.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a>: II-112–113  The entire underside of the orbiter vehicle, as well as the other hottest surfaces, were protected with black high-temperature reusable surface insulation. Areas on the upper parts of the orbiter vehicle were covered with white low-temperature reusable surface insulation, which provided protection at temperatures below 650 °C (1,200 °F). The payload bay doors and parts of the upper wing surfaces were covered with reusable felt surface insulation, as the temperature there remained below 370 °C (700 °F).<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a>: 395 
Two solid rocket boosters (SRBs) were connected to the ET, and burned for the first two minutes of flight.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a>: II-222  The SRBs separated from the ET once they had expended their fuel and fell into the Atlantic Ocean under a parachute.<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a>: II-289  NASA retrieval teams recovered the SRBs and returned them to the <a href="/facts/Kennedy_Space_Center/zmwszuPr">Kennedy Space Center</a> (KSC), where they were disassembled and their components were reused on future flights.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>: II-292 
When the Space Shuttle launched, the orbiter and SRBs were connected to the ET, which held the fuel for the SSMEs.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a>: II-222  The ET consisted of a tank for liquid hydrogen (LH2), stored at −253 °C (−423 °F) and a smaller tank for liquid oxygen (LOX), stored at −183 °C (−297 °F). It was covered in insulating foam to keep the liquids cold and prevent ice forming on the tank's exterior. The orbiter connected to the ET via two umbilicals near its bottom and a bipod near its top section.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a>: 50–51 
After its fuel had been expended, the ET separated from the orbiter and reentered the atmosphere, where it would break apart during reentry and its pieces would land in the <a href="/facts/Indian_Ocean/Kv0crwKG">Indian</a> or <a href="/facts/Pacific_Ocean/bdxgXRVM">Pacific Ocean</a>.<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>: II-238 

<h3>Debris strike concerns</h3>

During the design process of the Space Shuttle, a requirement of the ET was that it would not release any debris that could potentially damage the orbiter and its TPS. The integrity of the TPS components was necessary for the survival of the crew during reentry, and the tiles and panels were only built to withstand relatively minor impacts. On STS-1, the first flight of the Space Shuttle, the orbiter Columbia was damaged during its launch from a foam strike. Foam strikes occurred regularly during Space Shuttle launches; of the 79 missions with available imagery during launch, foam strikes occurred on 65 of them.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a>: 121–122 
The bipod connected the ET near the top to the front underside of the orbiter via two struts with a ramp at the tank end of each strut; the ramps were covered in foam to prevent ice from forming that could damage the orbiter. The foam on each bipod ramp was approximately 30 by 14 by 12 inches (76 by 36 by 30 cm), and was carved by hand from the original foam application.<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a> Bipod ramp foam from the left strut had been observed falling off the ET on six flights prior to <a href="/facts/STS-107/KccrjnNe">STS-107</a>, and had created some of the largest foam strikes that the orbiter experienced.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a> The first bipod ramp foam strike occurred during <a href="/facts/STS-7/hHdyQ8da">STS-7</a>; the orbiter's TPS was repaired after the mission but no changes were made to address the cause of the bipod foam loss.<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a>: 123  After bipod foam loss on <a href="/facts/STS-32/CRNTNYcg">STS-32</a>, NASA engineers, under the assumption that the foam loss was due to pressure buildup within the insulation, added vent holes to the foam to allow gas to escape. After a bipod foam strike damaged the TPS on <a href="/facts/STS-50/0U50rGhH">STS-50</a>, internal NASA investigations concluded it was an "accepted flight risk" and that it should not be treated as a flight safety issue. Bipod foam loss occurred on <a href="/facts/STS-52/husbg1d5">STS-52</a> and <a href="/facts/STS-62/UqMWfBFL">STS-62</a>, but neither event was noticed until the investigation following Columbia's destruction.<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>: 124 
During <a href="/facts/STS-112/4ISnbJov">STS-112</a>, which flew in October 2002, a 4-by-5-by-12-inch (10 by 13 by 30 cm) chunk of bipod ramp foam broke away from the ET bipod ramp and hit the SRB-ET attachment ring near the bottom of the left SRB, creating a dent 4 inches (10 cm) wide and 3 inches (8 cm) deep.<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a>: 124  Following the mission, the Program Requirements Control Board declined to categorize the bipod ramp foam loss as an in-flight anomaly. The foam loss was briefed at the <a href="/facts/STS-113/GK8YWXa0">STS-113</a> Flight Readiness Brief, but the Program Requirements Control Board decided that the ET was safe to fly.<a class="footnote-ref" id="fnref:26" href="#fn:26">26</a>: 125 
A debris strike from the <a href="/facts/Ablative_material/tTSHH09G">ablative material</a> on the right SRB caused significant damage to <a href="/facts/Space_Shuttle_Atlantis/3NQUThEB">Atlantis</a> during the <a href="/facts/STS-27/mCNr7FMo">STS-27</a> launch on December 2, 1988. On the second day of the flight the crew inspected the damage using a camera on the <a href="/facts/Remote_manipulator_system/zzemGb81">remote manipulator system</a>. The debris strike had removed a tile; the exposed orbiter skin was a reinforced section, and a burn-through might have occurred had the damage been in a different location. After the mission, the NASA Program Requirements Control Board designated the issue as an in-flight anomaly that was corrected with the planned improvement for the SRB ablator.<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a>: 127 

<h2 id="flight">Flight</h2>
<h3>Space Shuttle mission</h3>
Main article: <a href="/facts/STS-107/KccrjnNe">STS-107</a>

For STS-107, Columbia carried the <a href="/facts/SpaceHab/9NvjVomA">SpaceHab</a> Research Double Module, the Orbital Acceleration Research Experiment, and an <a href="/facts/Extended_Duration_Orbiter/38BgMv16">Extended Duration Orbiter</a> pallet.<a class="footnote-ref" id="fnref:28" href="#fn:28">28</a>: 30  The mission passed its pre-launch certifications and reviews, and began with the launch. The mission was originally scheduled to launch on January 11, 2001, but it was delayed thirteen times, until its launch on January 16, 2003.<a class="footnote-ref" id="fnref:29" href="#fn:29">29</a>: 28 
The seven-member crew of STS-107 were selected in July 2000.<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a>: 28  The mission was commanded by <a href="/facts/Rick_Husband/jw81T84d">Rick Husband</a>, who was a <a href="/facts/Colonel_(United_States)/eva6u8ok">colonel</a> in the <a href="/facts/United_States_Air_Force/7MxWBYlc">U.S. Air Force</a> and a <a href="/facts/Test_pilot/4zyLIYdj">test pilot</a>. He had previously flown on <a href="/facts/STS-96/qYRfzxFb">STS-96</a>.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a> The mission's pilot was <a href="/facts/William_McCool/U4gkM9cR">William McCool</a>, a <a href="/facts/United_States_Navy/xYK0fUou">U.S. Navy</a> <a href="/facts/Commander_(United_States)/gYDtAxXc">commander</a> who was on his first spaceflight.<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a> The payload commander was <a href="/facts/Michael_P._Anderson/ewj5zFho">Michael Anderson</a>, a U.S. Air Force <a href="/facts/Lieutenant_colonel_(United_States)/epSNL0Sw">lieutenant colonel</a> who had previously flown on <a href="/facts/STS-89/58T7T8bl">STS-89</a>.<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a> <a href="/facts/Kalpana_Chawla/l5EY7wmM">Kalpana Chawla</a> served as the flight engineer; she had previously flown on <a href="/facts/STS-87/1YFcAPAo">STS-87</a>.<a class="footnote-ref" id="fnref:34" href="#fn:34">34</a> <a href="/facts/David_M._Brown/G8t7aMKu">David Brown</a> and <a href="/facts/Laurel_Clark/dq1EulUR">Laurel Clark</a>, both <a href="/facts/Captain_(United_States_O-6)/D43xa4oj">Navy captains</a>, flew as the <a href="/facts/Mission_specialist/zvYb4mCz">mission specialists</a> on their first spaceflights.<a class="footnote-ref" id="fnref:35" href="#fn:35">35</a><a class="footnote-ref" id="fnref:36" href="#fn:36">36</a> <a href="/facts/Ilan_Ramon/hM3YQzAB">Ilan Ramon</a>, a colonel in the <a href="/facts/Israeli_Air_Force/bcm4GjTf">Israeli Air Force</a> and the first Israeli <a href="/facts/Astronaut/HB1bd6Lz">astronaut</a>, flew as a <a href="/facts/Payload_specialist/4nMY8GEd">payload specialist</a> on his first spaceflight.<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a><a class="footnote-ref" id="fnref:38" href="#fn:38">38</a>: 29 

<h3>Launch and debris strike</h3>

Columbia was launched from the <a href="/facts/Kennedy_Space_Center_Launch_Complex_39A/pnH83f5s">Kennedy Space Center Launch Complex 39A</a> (LC-39A) at 10:39:00 am. At T+81.7 seconds, a piece of foam approximately 21 to 27 inches (53 to 69 cm) long and 12 to 18 inches (30 to 46 cm) wide broke off from the left bipod on the ET. At T+81.9 seconds, the foam struck the <a href="/facts/Reinforced_carbon%25E2%2580%2593carbon/hDRQD3W2">reinforced carbon–carbon</a> (RCC) panels on Columbia's left wing at relative velocity of 625 to 840 feet per second (426 to 573 mph; 686 to 922 km/h).<a class="footnote-ref" id="fnref:39" href="#fn:39">39</a>: 34  The foam's low <a href="/facts/Ballistic_coefficient/cbA1Hw5b">ballistic coefficient</a> caused it to lose speed immediately after separating from the ET, and the orbiter ran into the slower foam.<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a>: 60  Neither the mission nor ground crew noticed the debris strike at the time.<a class="footnote-ref" id="fnref:41" href="#fn:41">41</a>: 140  The SRBs separated from the ET at T+2 minutes and 7 seconds, followed by the ET's separation from the orbiter at T+8 minutes 30 seconds.<a class="footnote-ref" id="fnref:42" href="#fn:42">42</a>: 35  The ET separation was photographed by Anderson and recorded by Brown, but they did not record the bipod with missing foam.<a class="footnote-ref" id="fnref:43" href="#fn:43">43</a>: 148  At T+43 minutes, Columbia completed its orbital insertion as planned.<a class="footnote-ref" id="fnref:44" href="#fn:44">44</a>: 35 

<h3>Flight risk management</h3>

After Columbia entered orbit, the NASA Intercenter Photo Working Group conducted a routine review of videos of the launch. The group's analysts did not notice the debris strike until the second day of the mission. None of the cameras that recorded the launch had a clear view of the debris striking the wing, leaving the group unable to determine the level of damage sustained by the orbiter. The group's chair contacted <a href="/facts/Wayne_Hale/QCQE5LGs">Wayne Hale</a>, the Shuttle Program Manager for Launch Integration, to request on-orbit pictures of Columbia's wing to assess its damage. After receiving notification of the debris strike, engineers at NASA, <a href="/facts/United_Space_Alliance/gKY4oCn5">United Space Alliance</a>, and <a href="/facts/Boeing/tF5sMe9F">Boeing</a> created the Debris Assessment Team and began working to determine the damage to the orbiter.<a class="footnote-ref" id="fnref:45" href="#fn:45">45</a>: 140, 143  Intercenter Photo Working Group believed that the orbiter's RCC tiles were possibly damaged; NASA program managers were less concerned over the danger caused by the debris strike.<a class="footnote-ref" id="fnref:46" href="#fn:46">46</a>: 141 
Boeing analysts attempted to model the damage caused to the orbiter's TPS from the foam strike. The software models predicted damage that was deeper than the thickness of the TPS tiles, indicating that the orbiter's aluminum skin would be unprotected in that area. The Debris Assessment Team dismissed this conclusion as inaccurate, because of previous instances of predictions of damage greater than the actual damage. Further modeling specific to the RCC panels used software calibrated to predict damage caused by falling ice. The software predicted only one of 15 scenarios that ice would cause damage, leading the Debris Assessment Team to conclude there was minimal damage due to the lower density of foam to ice.<a class="footnote-ref" id="fnref:47" href="#fn:47">47</a>: 143–145

To assess the possible damage to Columbia's wing, members of the Debris Assessment Team made multiple requests to get imagery of the orbiter from the <a href="/facts/United_States_Department_of_Defense/dWAvf7e3">Department of Defense</a> (DoD). Imagery requests were channeled through both the <a href="/facts/Department_of_Defense_Manned_Space_Flight_Support_Office/Ipv2kDNW">DoD Manned Space Flight Support Office</a> and the <a href="/facts/Johnson_Space_Center/rN6Jvhqe">Johnson Space Center</a> Engineering Directorate.<a class="footnote-ref" id="fnref:48" href="#fn:48">48</a>: 150–151  Hale coordinated the request through a DoD representative at KSC. The request was relayed to the <a href="/facts/United_States_Strategic_Command/Qp4m8VhP">U.S. Strategic Command</a> (USSTRATCOM), which began identifying imaging assets that could observe the orbiter. The imagery request was soon rescinded by NASA Mission Management Team Chair <a href="/facts/Linda_Ham/R1ESM26n">Linda Ham</a> after she investigated the origin of it. She had consulted with Flight Director Phil Engelauf and members of the Mission Management Team, who stated that they did not have a requirement for imagery of Columbia. Ham did not consult with the Debris Assessment Team, and cancelled the imagery request on the basis that it had not been made through official channels.<a class="footnote-ref" id="fnref:49" href="#fn:49">49</a>: 152–153  Maneuvering the orbiter to allow its left wing to be imaged would have interrupted ongoing science operations, and Ham dismissed the DoD imaging capabilities as insufficient to assess damage to the orbiter.<a class="footnote-ref" id="fnref:50" href="#fn:50">50</a>: 153–154  Following the rejection of their imagery request, the Debris Assessment Team did not make further requests for the orbiter to be imaged.<a class="footnote-ref" id="fnref:51" href="#fn:51">51</a>: 157 
Throughout the flight, members of the Mission Management Team were less concerned than the Debris Assessment Team about the potential risk of a debris strike. The loss of bipod foam on STS-107 was compared to previous foam strike events, none of which caused the loss of an orbiter or crew. Ham, scheduled to work as an integration manager for <a href="/facts/STS-114/2Un5SI8w">STS-114</a>, was concerned with the potential delays from a foam loss event.<a class="footnote-ref" id="fnref:52" href="#fn:52">52</a>: 147–148  Mission management also downplayed the risk of the debris strike in communications with the crew.<a class="footnote-ref" id="fnref:53" href="#fn:53">53</a>: 161  On January 23, flight director Steve Stich sent an e-mail to Husband and McCool to tell them about the foam strike and inform them there was no cause for concern about damage to the TPS, as foam strikes had occurred on previous flights.<a class="footnote-ref" id="fnref:54" href="#fn:54">54</a>: 159 

<blockquote>During ascent at approximately 80 seconds, photo analysis shows that some debris from the area of the -Y ET Bipod Attach Point came loose and subsequently impacted the orbiter left wing, in the area of transition from Chine to Main Wing, creating a shower of smaller particles. The impact appears to be totally on the lower surface and no particles are seen to traverse over the upper surface of the wing. Experts have reviewed the high speed photography and there is no concern for RCC or tile damage. We have seen this same phenomenon on several other flights and there is absolutely no concern for entry.<a class="footnote-ref" id="fnref:55" href="#fn:55">55</a>: 159 </blockquote>

The crew were also sent a fifteen-second video of the debris strike in preparation for a press conference, but were reassured that there were no safety concerns.<a class="footnote-ref" id="fnref:56" href="#fn:56">56</a>: 161 
On January 26, the Debris Assessment Team concluded that there were no safety concerns from the debris strike. The team's report was critical of the Mission Management Team for asserting that there were no safety concerns before the Debris Assessment Team's investigation had been completed.<a class="footnote-ref" id="fnref:57" href="#fn:57">57</a>: 164  On January 29, William Readdy, the Associate Administrator for Space Flight, agreed to DoD imaging of the orbiter, but on the condition that it would not interfere with flight operations; ultimately, the orbiter was not imaged by the DoD during the flight. At a Mission Management Team on January 31, the day before Columbia reentered the atmosphere, the Launch Integration Office voiced Ham's intention to review on-board footage to view the missing foam, but concerns of crew safety were not discussed.<a class="footnote-ref" id="fnref:58" href="#fn:58">58</a>: 166 

<h3>Reentry</h3>
Columbia was scheduled to reenter the atmosphere and land on February 1, 2003. At 3:30 am EST the Entry <a href="/facts/Flight_controller/qu44PG1U">Flight Control Team</a> started its shift at the <a href="/facts/Christopher_C._Kraft_Jr._Mission_Control_Center/8DxahkB2">Mission Control Center</a>.<a class="footnote-ref" id="fnref:59" href="#fn:59">59</a>: 38  On board the orbiter, the crew stowed loose items and prepared their equipment for reentry.<a class="footnote-ref" id="fnref:60" href="#fn:60">60</a>: 1.5 
At 45 minutes before the deorbit burn, Husband and McCool began working through the entry checklist.<a class="footnote-ref" id="fnref:61" href="#fn:61">61</a>: 1.6  At 8:10 am the <a href="/facts/Flight_controller/qu44PG1U">Capsule Communicator (CAPCOM)</a>, <a href="/facts/Charles_O._Hobaugh/nUmKjFf7">Charlie Hobaugh</a>,<a class="footnote-ref" id="fnref:62" href="#fn:62">62</a> informed the crew that they were approved to conduct the deorbit burn. At 8:15:30 the crew successfully executed the deorbit burn, which lasted 2 minutes and 38 seconds. At 8:44:09 Columbia reentered the atmosphere at an altitude of 400,000 feet (120 km), a point named entry interface. The damage to the TPS on the orbiter's left wing allowed for hot air to enter and begin melting the aluminum structure.<a class="footnote-ref" id="fnref:63" href="#fn:63">63</a>: 9  Four and a half minutes after entry interface, a sensor began recording greater-than-normal amounts of strain on the left wing; the sensor's data was recorded to internal storage and not transmitted to the crew or ground controllers.<a class="footnote-ref" id="fnref:64" href="#fn:64">64</a>: 38  The orbiter began to turn (<a href="/facts/Aircraft_principal_axes/zmL8M13t">yaw</a>) to the left as a result of the increased drag on the left wing, but this was not noticed by the crew or mission control because of corrections from the orbiter's flight control system.<a class="footnote-ref" id="fnref:65" href="#fn:65">65</a>: 1.8  This was followed by sensors in the left wheel well reporting a rise in temperature.<a class="footnote-ref" id="fnref:66" href="#fn:66">66</a>: 1.10

At 8:53:46 am, Columbia crossed over the <a href="/facts/California/zLW2vdQJ">California</a> coast; it was traveling at Mach 23 at an altitude of 231,600 feet (70.6 km), and the temperature of its wings' leading edges was estimated to be 2,800 °F (1,540 °C).<a class="footnote-ref" id="fnref:67" href="#fn:67">67</a>: 38  Soon after it entered California airspace, the orbiter shed several pieces of debris, events observed on the ground as sudden increases in brightness of the air around the orbiter. The <a href="/facts/List_of_NASA%2527s_flight_control_positions/E999csCG">MMACS</a> officer reported that the hydraulic sensors in the left wing had readings below the sensors' minimum detection thresholds at 8:54:24 am. Columbia continued its reentry and traveled over <a href="/facts/Utah/te7zUyBX">Utah</a>, <a href="/facts/Arizona/6ayM3swJ">Arizona</a>, <a href="/facts/New_Mexico/wosJCGaW">New Mexico</a>, and <a href="/facts/Texas/B987WHF0">Texas</a>, where observers would report seeing signs of debris being shed.<a class="footnote-ref" id="fnref:68" href="#fn:68">68</a>: 39 
At 8:58:03, the orbiter's <a href="/facts/Flight_control_surfaces/wux1lX6A">aileron trim</a> changed from the predicted values because of the increasing drag caused by the damage to the left wing. At 8:58:21, the orbiter shed a TPS tile that would later land in <a href="/facts/Littlefield%2c_Texas/RGIYwBCx">Littlefield, Texas</a>; it would become the westernmost piece of recovered debris.<a class="footnote-ref" id="fnref:69" href="#fn:69">69</a>: 1.12  The crew first received an indication of a problem at 8:58:39, when the Backup Flight Software monitor began displaying fault messages for a loss of pressure in the tires of the left landing gear. The pilot and commander then received indications that the status of the left landing gear was unknown, as different sensors reported the gear was down and locked or in the stowed position.<a class="footnote-ref" id="fnref:70" href="#fn:70">70</a>: 1.13  The drag of the left wing continued to yaw the orbiter to the left until it could no longer be corrected using aileron trim. The orbiter's <a href="/facts/Space_Shuttle_orbiter/pD50Txk9">Reaction Control System</a> (RCS) thrusters began firing continuously to correct its orientation.<a class="footnote-ref" id="fnref:71" href="#fn:71">71</a>: 1.14 
The loss of signal (LOS) from Columbia occurred at 8:59:32. Mission control stopped receiving information from the orbiter at this time, and Husband's last radio call of "Roger, uh ..." was cut off mid-transmission.<a class="footnote-ref" id="fnref:72" href="#fn:72">72</a>: 39 <a class="footnote-ref" id="fnref:73" href="#fn:73">73</a>: 1.14  One of the channels in the flight control system was bypassed as the result of a failed wire, and a Master Alarm began sounding on the flight deck.<a class="footnote-ref" id="fnref:74" href="#fn:74">74</a>: 1.15  Loss of control of the orbiter is estimated to have begun several seconds later with a loss of hydraulic pressure and an uncontrolled <a href="/facts/Aircraft_principal_axes/zmL8M13t">pitch</a>-up maneuver.<a class="footnote-ref" id="fnref:75" href="#fn:75">75</a>: 1.16  The orbiter began flying along a <a href="/facts/Ballistic_trajectory/yBGsDIGe">ballistic trajectory</a>, which was significantly steeper and had more drag than the previous gliding trajectory.<a class="footnote-ref" id="fnref:76" href="#fn:76">76</a>: 1.17  The orbiter, while still traveling faster than Mach 15, entered into a <a href="/facts/Flat_spin_(aviation)/oHIXfHHw">flat spin</a> of 30° to 40° per second. The acceleration that the crew was experiencing increased from approximately 0.8 <a href="/facts/G-force/F5j4of9l">g</a> to 3 g, which would have likely caused dizziness and disorientation, but not incapacitation.<a class="footnote-ref" id="fnref:77" href="#fn:77">77</a>: 1.18  The autopilot was switched to manual control and reset to automatic mode at 9:00:03; this would have required the input of either Husband or McCool, indicating that they were still conscious and able to perform functions at the time. All hydraulic pressure was lost, and McCool's final switch configurations indicate that he had tried to restore the hydraulic systems at some time after 9:00:05.<a class="footnote-ref" id="fnref:78" href="#fn:78">78</a>: 1.20

At 9:00:18, the orbiter began a catastrophic breakup, and all on-board data recording soon ceased.<a class="footnote-ref" id="fnref:79" href="#fn:79">79</a>: 1.20  Ground observers noted a sudden increase in debris being shed, and all on-board systems lost power. By 9:00:25, the orbiter's fore and aft sections had separated from one another.<a class="footnote-ref" id="fnref:80" href="#fn:80">80</a>: 1.21  The sudden <a href="/facts/Jerk_(physics)/8T5H2g0C">jerk</a> caused the crew compartment to collide with the interior wall of the fuselage, resulting in the start of depressurization of the crew compartment by 9:00:35.<a class="footnote-ref" id="fnref:81" href="#fn:81">81</a>: 1.22  The pieces of the orbiter continued to break apart into smaller pieces, and within a minute after breakup were too small to be detected by ground-based videos. A NASA report estimates that by 9:35, all crew remains and a majority of debris had hit the ground.<a class="footnote-ref" id="fnref:82" href="#fn:82">82</a>: 1.77 
The loss of signal occurred at a time when the Flight Control Team expected brief communication outages as the orbiter stopped communication via the west <a href="/facts/Tracking_and_data_relay_satellite/dycpN8r9">tracking and data relay satellite</a> (TDRS). Personnel in Mission Control were unaware of the in-flight break-up, and continued to try to reestablish contact with the orbiter.<a class="footnote-ref" id="fnref:83" href="#fn:83">83</a>: 43  At around 9:12:39, when Columbia would have been conducting its final maneuvers to land, a Mission Control member received a phone call concerning news coverage of the orbiter breaking up. This information was immediately passed on to the Entry Flight Director, <a href="/facts/LeRoy_E._Cain/1Sz9uh3J">LeRoy Cain</a>, who initiated contingency procedures.<a class="footnote-ref" id="fnref:84" href="#fn:84">84</a>: 44  At KSC, where Columbia had been expected to land at 9:16, NASA Associate Administrator and former astronaut <a href="/facts/William_Readdy/KNrnb0Me">William Readdy</a> also began contingency procedures after the orbiter did not land as scheduled.<a class="footnote-ref" id="fnref:85" href="#fn:85">85</a>: 5 

<h3>Crew survivability</h3>
During reentry, all seven of the STS-107 crew members were killed, but the exact time of their deaths could not be determined. The level of acceleration that they experienced during crew module breakup was not lethal.<a class="footnote-ref" id="fnref:86" href="#fn:86">86</a>: 77  The first lethal event the crew experienced was the <a href="/facts/Uncontrolled_decompression/SIIhmowS">depressurization</a> of the crew module. The rate and exact time of complete depressurization could not be determined, but it occurred no later than 9:00:59 and was likely much earlier. The remains of the crew members indicated they all experienced depressurization. The astronauts' helmets have a visor that, when closed, can temporarily protect the crew member from depressurization. None of the crew members had closed their visors, and one was not wearing a helmet; this would indicate that depressurization occurred quickly before they could take protective measures. They were rendered unconscious or deceased within seconds and tissue damage was extensive enough that they could not have regained consciousness even if the cabin had regained pressurization.<a class="footnote-ref" id="fnref:87" href="#fn:87">87</a>: 1.24 <a class="footnote-ref" id="fnref:88" href="#fn:88">88</a>: 89, 103 
During and after the breakup of the crew module, the crew, either unconscious or dead, experienced rotation on all three axes. The astronauts' shoulder harnesses were unable to prevent trauma to their upper bodies, as the <a href="/facts/Seat_belt/2m5BvW5Y">inertia reel system</a> failed to retract sufficiently to secure them, leaving them only restrained by their lap belts. The helmets were not conformal to the crew members' heads, allowing head injuries to occur inside of the helmet. The neck ring of the helmet may have also acted as a fulcrum that caused spine and neck injuries. The physical trauma to the astronauts, who could not brace to prevent such injuries, also could have resulted in their deaths.<a class="footnote-ref" id="fnref:89" href="#fn:89">89</a>: 1.25 <a class="footnote-ref" id="fnref:90" href="#fn:90">90</a>: 103–105 
The astronauts also likely suffered from significant thermal trauma. Hot gas entered the disintegrating crew module, burning the crew members, whose bodies were still somewhat protected by their ACES suits. Once the crew module fell apart, the astronauts were violently exposed to windblast and a possible shock wave, which stripped their suits from their bodies. The crews' remains were exposed to hot gas and molten metal as they fell away from the orbiter.<a class="footnote-ref" id="fnref:91" href="#fn:91">91</a>: 106–108 
After separation from the crew module, the bodies of the crew members entered an environment with almost no oxygen, very low atmospheric pressure, and both high temperatures caused by deceleration, and extremely low ambient temperatures.<a class="footnote-ref" id="fnref:92" href="#fn:92">92</a>: 93  Their bodies hit the ground with lethal force.<a class="footnote-ref" id="fnref:93" href="#fn:93">93</a>: 1.29 

<h2 id="presidential-response">Presidential response</h2>

At 14:04 EST (19:04 UTC), President <a href="/facts/George_W._Bush/mYSgM515">George W. Bush</a> said in a televised address to the nation, "My fellow Americans, this day has brought terrible news, and great sadness to our country. At 9:00 a.m. this morning, Mission Control in Houston lost contact with our Space Shuttle Columbia. A short time later, debris was seen falling from the skies above Texas. The Columbia is lost; there are no survivors."<a class="footnote-ref" id="fnref:94" href="#fn:94">94</a>

<h2 id="recovery-of-debris">Recovery of debris</h2>

After the orbiter broke up, reports came in to eastern Texas law enforcement agencies of an explosion and falling debris.<a class="footnote-ref" id="fnref:95" href="#fn:95">95</a>: 59  Astronauts <a href="/facts/Mark_Kelly_(astronaut)/hwD9V1Yu">Mark Kelly</a> and <a href="/facts/Gregory_H._Johnson/4Tpr87pX">Gregory Johnson</a> traveled on a <a href="/facts/US_Coast_Guard/6d7SWTP9">US Coast Guard</a> helicopter from Houston to <a href="/facts/Nacogdoches%2c_Texas/AAPmy0yz">Nacogdoches</a>,<a class="footnote-ref" id="fnref:96" href="#fn:96">96</a>: 61  and <a href="/facts/Jim_Wetherbee/yqQhmR30">Jim Wetherbee</a> drove a team of astronauts to <a href="/facts/Lufkin%2c_Texas/wAK3akof">Lufkin</a> to assist with recovery efforts.<a class="footnote-ref" id="fnref:97" href="#fn:97">97</a>: 61  Debris was reported from east Texas through southern Louisiana.<a class="footnote-ref" id="fnref:98" href="#fn:98">98</a>: 96  Recovery crews and local volunteers worked to locate and identify debris.<a class="footnote-ref" id="fnref:99" href="#fn:99">99</a>: 93 
On the first day of the disaster, searchers began finding remains of the astronauts.<a class="footnote-ref" id="fnref:100" href="#fn:100">100</a>: 98  Within three days of the crash, some remains from every crew member had been recovered.<a class="footnote-ref" id="fnref:101" href="#fn:101">101</a>: 117  These recoveries occurred along a line south of <a href="/facts/Hemphill%2c_Texas/dNy5xeXb">Hemphill, Texas</a>, and west of the <a href="/facts/Toledo_Bend_Reservoir/dVzB1clj">Toledo Bend Reservoir</a>.<a class="footnote-ref" id="fnref:102" href="#fn:102">102</a>: 123  The final body of a crew member was recovered on February 11.<a class="footnote-ref" id="fnref:103" href="#fn:103">103</a>: 131  The crew remains were transported to the Armed Forces Institute of Pathology at <a href="/facts/Dover_Air_Force_Base/PTE9t5RM">Dover Air Force Base</a>.<a class="footnote-ref" id="fnref:104" href="#fn:104">104</a>: 117 
Immediately after the disaster, the <a href="/facts/Texas_Army_National_Guard/zLpF5c4M">Texas Army National Guard</a> deployed 300 members to assist with security and recovery, and the Coast Guard <a href="/facts/Deployable_Operations_Group/HJ8alSo9">Gulf Strike Team</a> was assigned to help recover hazardous debris.<a class="footnote-ref" id="fnref:105" href="#fn:105">105</a>: 104  Over the following days, the search grew to include hundreds of individuals from the <a href="/facts/Environmental_Protection_Agency/ghI985SI">Environmental Protection Agency</a>, <a href="/facts/US_Forest_Service/NRzYYHhc">US Forest Service</a>, <a href="/facts/Civil_Air_Patrol/05sv88n9">Civil Air Patrol</a>, and Texas and Louisiana public safety organizations, as well as local volunteers.<a class="footnote-ref" id="fnref:106" href="#fn:106">106</a>: 119  In the months after the disaster, the largest-ever organized ground search took place.<a class="footnote-ref" id="fnref:107" href="#fn:107">107</a> NASA officials warned of the dangers of handling debris, as it could have been contaminated by propellants.<a class="footnote-ref" id="fnref:108" href="#fn:108">108</a>: 145 <a class="footnote-ref" id="fnref:109" href="#fn:109">109</a>
Soon after the accident, some individuals attempted to sell Columbia debris on the internet, including on the online auction website <a href="/facts/EBay/bDswVAKB">eBay</a>. Officials at NASA were critical of these efforts, as the debris was NASA property and was needed for the investigation.<a class="footnote-ref" id="fnref:110" href="#fn:110">110</a> A three-day amnesty period was offered for recovered orbiter debris.<a class="footnote-ref" id="fnref:111" href="#fn:111">111</a> During this time, about 20 individuals contacted NASA to return debris, which included debris from the Challenger disaster.<a class="footnote-ref" id="fnref:112" href="#fn:112">112</a>: 118–119 <a class="footnote-ref" id="fnref:113" href="#fn:113">113</a>: 156  After the end of the amnesty period, several individuals were arrested for illegal looting and possession of debris.<a class="footnote-ref" id="fnref:114" href="#fn:114">114</a>
Columbia's <a href="/facts/Flight_data_recorder/Pp41CNsY">flight data recorder</a> was found near Hemphill, Texas, 75 miles (121 km) southeast of Nacogdoches, on March 19, 2003.<a class="footnote-ref" id="fnref:115" href="#fn:115">115</a> Columbia was the first orbiter, and it had a unique flight data OEX (Orbiter EXperiments) recorder to record vehicle performance data during the test flights. The recorder was left in Columbia after the initial Shuttle test-flights were completed, and began recording information 15 minutes prior to reentry. The tape it recorded to was broken at the time of the crash, but information from the orbiter's sensors could have been recorded beforehand.<a class="footnote-ref" id="fnref:116" href="#fn:116">116</a>: 187–189 <a class="footnote-ref" id="fnref:117" href="#fn:117">117</a> Several days later, the tape was sent to the <a href="/facts/Imation_Corporation/ElJGYYcF">Imation Corporation</a> for it to be inspected and cleaned. On March 25, the OEX's tape was sent to KSC, where it was copied and analyzed.<a class="footnote-ref" id="fnref:118" href="#fn:118">118</a>: 190 
On March 27, a <a href="/facts/Bell_407/WjoXQRVT">Bell 407</a> helicopter that was being used in the debris search crashed due to mechanical failure in the <a href="/facts/Angelina_National_Forest/hI1nmJma">Angelina National Forest</a>. The crash killed the pilot, Jules F. Mier Jr., and a <a href="/facts/Texas_Forest_Service/ktlKU3Df">Texas Forest Service</a> aviation specialist, Charles Krenek, and injured three other crew members.<a class="footnote-ref" id="fnref:119" href="#fn:119">119</a>: 46 <a class="footnote-ref" id="fnref:120" href="#fn:120">120</a>
A group of <a href="/facts/Caenorhabditis_elegans/XJVJzPn2">Caenorhabditis elegans</a> worms, enclosed in aluminum canisters, survived reentry and impact with the ground and were recovered weeks after the disaster.<a class="footnote-ref" id="fnref:121" href="#fn:121">121</a> The culture, which was part of an experiment to research their growth while consuming synthetic nutrients, was found to be alive on April 28, 2003.<a class="footnote-ref" id="fnref:122" href="#fn:122">122</a>
NASA management selected the Reusable Launch Vehicle hangar at KSC to reconstruct recovered Columbia debris. NASA <a href="/facts/Launch_Control_Center/7K5CweED">Launch Director</a> <a href="/facts/Michael_Leinbach/bsfI7FQ0">Michael Leinbach</a> led the reconstruction team, which was staffed by Columbia engineers and technicians. Debris was laid out on the floor of the hangar in the shape of the orbiter to allow investigators to look for patterns in the damage that indicated the cause of the disaster.<a class="footnote-ref" id="fnref:123" href="#fn:123">123</a>: 206–207  Astronaut <a href="/facts/Pamela_Melroy/AhNBgm1c">Pamela Melroy</a> was assigned to oversee the six-person team reconstructing the crew compartment, which included fellow astronaut <a href="/facts/Marsha_Ivins/1Eb0TIGT">Marsha Ivins</a>.<a class="footnote-ref" id="fnref:124" href="#fn:124">124</a>: 210–211 
Recovered debris was shipped from the field to KSC, where it was unloaded and checked to see if it was contaminated by toxic <a href="/facts/Hypergolic_propellant/p0Goa3rn">hypergolic propellants</a>. Each piece of debris had an identifying number and a tag indicating the coordinates where it was found. Staff attached photographs and catalogued each piece of debris.<a class="footnote-ref" id="fnref:125" href="#fn:125">125</a>: 217  Recovered debris from inside the orbiter was placed in a separate area, as it was not considered to be a contributor to the accident.<a class="footnote-ref" id="fnref:126" href="#fn:126">126</a>: 209–210  NASA conducted a <a href="/facts/Fault_tree_analysis/rTD7Xd0t">fault tree analysis</a> to determine the probable causes of the accident, and focused its investigations on the parts of the orbiter most likely to have been responsible for the in-flight breakup.<a class="footnote-ref" id="fnref:127" href="#fn:127">127</a>: 215  Engineers in the hangar analyzed the debris to determine how the orbiter came apart. Even though the crew compartment was not considered as a likely cause of the accident, Melroy successfully argued for its analysis to learn more about how its safety systems helped, or failed to help, the crew survive.<a class="footnote-ref" id="fnref:128" href="#fn:128">128</a>: 224–225  The tiles on the left wing were studied to determine the nature of the burning and melting that occurred. The damage to the debris indicated that the breach began at the wing's leading edge, allowing hot gas to get past the orbiter's thermal protection system.<a class="footnote-ref" id="fnref:129" href="#fn:129">129</a>: 232 
The search for Columbia debris ended in May.<a class="footnote-ref" id="fnref:130" href="#fn:130">130</a>: 203  Approximately 83,900 pieces of debris were recovered, weighing 84,900 pounds (38,500 kg), which was about 38 percent of the orbiter's overall weight. When the CAIB report was released, about 40,000 recovered pieces of debris had not been identified.<a class="footnote-ref" id="fnref:131" href="#fn:131">131</a>: 1  All recovered non-human Columbia debris was stored in unused office space at the <a href="/facts/Vehicle_Assembly_Building/UIc81qxV">Vehicle Assembly Building</a>, except for parts of the crew compartment, which were kept separate.<a class="footnote-ref" id="fnref:132" href="#fn:132">132</a> By the end of reconstruction efforts only 720 items remained classified as unknown.<a class="footnote-ref" id="fnref:133" href="#fn:133">133</a>: 218 
In July 2011, lower water levels caused by a drought revealed a four-foot-diameter (1.2 m) piece of debris in <a href="/facts/Lake_Nacogdoches/00mGJsCe">Lake Nacogdoches</a>. NASA identified the piece as a power reactant storage and distribution tank.<a class="footnote-ref" id="fnref:134" href="#fn:134">134</a>

<h2 id="columbiaaccident-investigation-board">Columbia Accident Investigation Board</h2>
Main article: <a href="/facts/Columbia_Accident_Investigation_Board/LpQ2cUDT">Columbia Accident Investigation Board</a>
About ninety minutes after the disaster, NASA Administrator <a href="/facts/Sean_O%2527Keefe/eImVef88">Sean O'Keefe</a> called to convene the <a href="/facts/Columbia_Accident_Investigation_Board/LpQ2cUDT">Columbia Accident Investigation Board</a> (CAIB) to determine the cause.<a class="footnote-ref" id="fnref:135" href="#fn:135">135</a>: 231 <a class="footnote-ref" id="fnref:136" href="#fn:136">136</a> It was chaired by retired U.S. Navy Admiral <a href="/facts/Harold_W._Gehman%2c_Jr./Loe7o70c">Harold W. Gehman, Jr.</a> and included military and civilian analysts. It initially consisted of eight members, including Gehman, but expanded to 13 members by March. The CAIB members were notified by noon on the day of the accident, and participated in a teleconference that evening. The following day, they traveled to Barksdale AFB to begin the investigation. The CAIB members first toured the debris fields, and then established their operations at JSC. The CAIB established four teams to investigate NASA management and program safety, NASA training and crew operations, the technical aspects of the disaster, and how NASA culture affected the Space Shuttle program. These groups collaborated, and hired other support staff to investigate.<a class="footnote-ref" id="fnref:137" href="#fn:137">137</a>: 231–232  The CAIB worked alongside the reconstruction efforts to determine the cause of the accident, and interviewed members of the Space Shuttle program, including those who had been involved with STS-107.<a class="footnote-ref" id="fnref:138" href="#fn:138">138</a>: 234–235  The CAIB conducted public hearings from March until June,<a class="footnote-ref" id="fnref:139" href="#fn:139">139</a>: 237–238  and released its final report in August 2003.<a class="footnote-ref" id="fnref:140" href="#fn:140">140</a>: 2 

<h3>Cause of the accident</h3>
After looking at sensor data, the CAIB considered damage to the left wing as a likely culprit for Columbia's destruction. It investigated that recovered debris and noted the difference in heat damage between the two wings. RCC panels from the left wing were found in the western portion of the debris field, indicating that it was shed first before the rest of the orbiter disintegrated.<a class="footnote-ref" id="fnref:141" href="#fn:141">141</a>: 73–74  <a href="/facts/X-ray/wseP79cN">X-ray</a> and chemical analysis was conducted on the RCC panels, revealing the highest levels of slag deposits to be in the left wing tiles.<a class="footnote-ref" id="fnref:142" href="#fn:142">142</a>: 75–76  Impact testing was conducted at the <a href="/facts/Southwest_Research_Institute/8ljrULa4">Southwest Research Institute</a>, using a nitrogen-powered gun to fire a projectile made of the same material as the ET bipod foam. Panels taken from <a href="/facts/Space_Shuttle_Enterprise/HhtH1PfY">Enterprise</a>, <a href="/facts/Space_Shuttle_Discovery/MmSTr4G0">Discovery</a>, and <a href="/facts/Space_Shuttle_Atlantis/3NQUThEB">Atlantis</a> were used to determine the projectiles' effect on RCC panels.<a class="footnote-ref" id="fnref:143" href="#fn:143">143</a>: 79–80  A test on RCC panel 8, taken from Atlantis, was the most consistent with the damage observed on Columbia, indicating it was the damaged panel that led to the in-flight breakup.<a class="footnote-ref" id="fnref:144" href="#fn:144">144</a>: 82–83 

<h3>Organizational culture</h3>
The CAIB was critical of NASA organizational culture, and compared its current state to that of NASA leading up to the Challenger disaster.<a class="footnote-ref" id="fnref:145" href="#fn:145">145</a>: 99  It concluded that NASA was experiencing budget constraints while still expecting to keep a high level of launches and operations.<a class="footnote-ref" id="fnref:146" href="#fn:146">146</a>: 100  Program operating costs were lowered by 21% from 1991 to 1994,<a class="footnote-ref" id="fnref:147" href="#fn:147">147</a>: 107  despite a planned increase in the yearly flight rate for assembly of the International Space Station.<a class="footnote-ref" id="fnref:148" href="#fn:148">148</a>: 114  Despite a history of foam strike events, NASA management did not consider the potential risk to the astronauts as a safety-of-flight issue.<a class="footnote-ref" id="fnref:149" href="#fn:149">149</a>: 126  The CAIB found that a lack of a safety program led to the lack of concern over foam strikes.<a class="footnote-ref" id="fnref:150" href="#fn:150">150</a>: 177  The board determined that NASA lacked the appropriate communication and integration channels to allow problems to be discussed and effectively routed and addressed.<a class="footnote-ref" id="fnref:151" href="#fn:151">151</a>: 187  This risk was further compounded by pressure to adhere to a launch schedule for construction of the ISS.<a class="footnote-ref" id="fnref:152" href="#fn:152">152</a>: 198 

<h3>Possible emergency procedures</h3>
In its report, the CAIB discussed potential options that could have saved Columbia's crew.<a class="footnote-ref" id="fnref:153" href="#fn:153">153</a> They determined that the mission could have been extended to at most 30 days (February 15), after which the <a href="/facts/Lithium_hydroxide/T2zUqmSa">lithium hydroxide</a> canisters used to remove carbon dioxide would have run out.<a class="footnote-ref" id="fnref:154" href="#fn:154">154</a>: 173  On STS-107, Columbia was carrying the Extended Duration Orbiter, which increased its supply of oxygen and hydrogen.<a class="footnote-ref" id="fnref:155" href="#fn:155">155</a>: 398  To maximize the mission duration, non-essential systems would have been powered down,<a class="footnote-ref" id="fnref:156" href="#fn:156">156</a>: 399  and animals in the <a href="/facts/Spacehab/9NvjVomA">Spacehab</a> module would have been euthanized.<a class="footnote-ref" id="fnref:157" href="#fn:157">157</a>: 397 
When STS-107 launched, Atlantis was undergoing preparation for the STS-114 launch on March 1, 2003. Had NASA management decided to launch a rescue mission, an expedited process could have begun to launch it as a rescue vehicle. Some pre-launch tests would have been eliminated to allow it to launch on time. Atlantis would have launched with additional equipment for <a href="/facts/Extravehicular_activity/udj91j1E">EVAs</a>, and launched with a minimum required crew. It would have rendezvoused with Columbia, and the STS-107 crew would have conducted EVAs to transfer to Atlantis. Columbia would have been remotely deorbited; as Mission Control would have been unable to remotely land it, it would have been disposed of in the Pacific Ocean.<a class="footnote-ref" id="fnref:158" href="#fn:158">158</a>: 400–404 
The CAIB also investigated the possibility of on-orbit repair of the left wing. Although there were no materials or adhesives onboard Columbia that could have survived reentry, the board researched the effectiveness of stuffing materials from the orbiter, crew cabin, or water into the RCC hole. They determined that the best option would have been to harvest tiles from other places on the orbiter, shape them, and then stuff them into the RCC hole. Given the difficulty of on-orbit repair and the risk of further damaging the RCC tiles, the CAIB determined that the likelihood of a successful on-orbit repair would have been low.<a class="footnote-ref" id="fnref:159" href="#fn:159">159</a>: 405–406 

<h2 id="nasa-response">NASA response</h2>
<h3>Space Shuttle updates</h3>
The Space Shuttle program was suspended after the loss of Columbia.<a class="footnote-ref" id="fnref:160" href="#fn:160">160</a> The further construction of the <a href="/facts/International_Space_Station/VNPUBz9m">International Space Station</a> (ISS) was delayed, as the Space Shuttle had been scheduled for seven missions to the ISS in 2003 and 2004 to complete its construction.<a class="footnote-ref" id="fnref:161" href="#fn:161">161</a>
To prevent future foam strikes, the ET was redesigned to remove foam from the bipod. Instead, electric heaters were installed to prevent ice building up in the bipod due to the cold liquid oxygen in its feedlines.<a class="footnote-ref" id="fnref:162" href="#fn:162">162</a> Additional heaters were also installed along the liquid oxygen line, which ran from the base of the tank to its interstage section.<a class="footnote-ref" id="fnref:163" href="#fn:163">163</a> NASA also improved its ground imaging capabilities at Kennedy Space Center to better observe and monitor potential issues that occur during launch. The existing cameras at LC-39A, <a href="/facts/Kennedy_Space_Center_Launch_Complex_39B/TS56c5d6">LC-39B</a>, and along the coast were upgraded, and nine new camera sites were added. Cameras were added to the bellies of Discovery, Atlantis, and Endeavour (only Columbia and Challenger had them prior) to allow digital images of the ET to be viewed on the ground soon after launch. The prior system on Columbia used film and could only be downlinked after the orbiter returned to Earth.<a class="footnote-ref" id="fnref:164" href="#fn:164">164</a> The Orbiter Boom Sensor System, a camera on the end of the <a href="/facts/Canadarm/zzemGb81">Canadarm</a>, was added to allow the crew to inspect the orbiter for any tile damage once they reached orbit.<a class="footnote-ref" id="fnref:165" href="#fn:165">165</a><a class="footnote-ref" id="fnref:166" href="#fn:166">166</a> Each of the orbiter's wings was equipped with 22 temperature sensors to detect any breaches during reentry and with 66 <a href="/facts/Accelerometers/xxrXzrlI">accelerometers</a> to detect an impact. Post-landing inspection procedures were updated to include technicians examining the RCC panels using flash thermography.<a class="footnote-ref" id="fnref:167" href="#fn:167">167</a>
As well as the updates to the orbiter, NASA prepared contingency plans in the event that a mission would be unable to safely land. The plan involved the stranded mission docking with the ISS, on which the crew would inspect and attempt to repair the damaged orbiter. If they were unsuccessful, they would remain aboard the ISS and wait for a rescue.<a class="footnote-ref" id="fnref:168" href="#fn:168">168</a>: 81  The rescue mission, designated <a href="/facts/STS-3xx/z4qY1K4q">STS-3xx</a>, would be activated, and would use the next-in-line hardware for the orbiter, ET, and SRBs. The expected time to launch would be 35 days, as that was the requirement to prepare launch facilities.<a class="footnote-ref" id="fnref:169" href="#fn:169">169</a>: 89–91  Before the arrival of the rescue mission, the stranded crew would power up the damaged orbiter, which would be remotely controlled as it was undocked and deorbited, and its debris would land in the Pacific Ocean.<a class="footnote-ref" id="fnref:170" href="#fn:170">170</a>: 62  The minimal crew would launch, dock with the ISS, and spend a day transferring astronauts and equipment before undocking and landing.<a class="footnote-ref" id="fnref:171" href="#fn:171">171</a>: 89–91 

<h3>First Return to Flight mission (STS-114)</h3>
Main article: <a href="/facts/STS-114/2Un5SI8w">STS-114</a>

The first Return to Flight mission, STS-114, began with the launch of Discovery on July 26, 2005, at 10:39 am (EDT).<a class="footnote-ref" id="fnref:172" href="#fn:172">172</a> Sixteen pieces of foam from the ET were dislodged during the launch that were large enough to be considered significant by NASA investigators,<a class="footnote-ref" id="fnref:173" href="#fn:173">173</a>: 7  including one piece that was approximately 36 by 11 inches (91 by 28 cm).<a class="footnote-ref" id="fnref:174" href="#fn:174">174</a>: 18  Post-launch investigations did not find any indications of damage from the foam loss, but ET video did reveal that a small piece of TPS tile from the nose landing gear fell off during launch.<a class="footnote-ref" id="fnref:175" href="#fn:175">175</a> Upon reaching orbit the crew inspected Discovery with the Orbiter Boom Sensor System. On July 29 Discovery <a href="/facts/Space_rendezvous/8KlcQyyf">rendezvoused</a> with the ISS and, before <a href="/facts/Docking_and_berthing_of_spacecraft/zUWc9rvu">docking</a>, performed the first <a href="/facts/Rendezvous_pitch_maneuver/GB2FkkFr">rendezvous pitch maneuver</a> to allow the crew aboard the ISS to observe and photograph the orbiter's belly.<a class="footnote-ref" id="fnref:176" href="#fn:176">176</a> The next day, astronauts <a href="/facts/Soichi_Noguchi/6yelbx8j">Soichi Noguchi</a> and <a href="/facts/Stephen_Robinson/26Mb3DKL">Stephen Robinson</a> performed the first of three <a href="/facts/Spacewalks/udj91j1E">spacewalks</a>. They tested a tile repair tool, the Emittance Wash Applicator, on intentionally damaged TPS tiles that had been brought in the <a href="/facts/Space_Shuttle/7BoyetEv">payload bay</a>.<a class="footnote-ref" id="fnref:177" href="#fn:177">177</a>: 62  On August 3 the same astronauts performed the third EVA of the mission, during which Robinson stood on the ISS's <a href="/facts/Mobile_Servicing_System/Sj8HSaJv">Canadarm2</a> and went to Discovery's belly to remove two gap fillers between tiles that had begun to protrude.<a class="footnote-ref" id="fnref:178" href="#fn:178">178</a>: 63 <a class="footnote-ref" id="fnref:179" href="#fn:179">179</a> After a delay due to bad weather at KSC, the decision was made to land at <a href="/facts/Edwards_AFB/MwAW8n6a">Edwards AFB</a>. Discovery successfully landed at 8:11 am (EDT) on August 9.<a class="footnote-ref" id="fnref:180" href="#fn:180">180</a><a class="footnote-ref" id="fnref:181" href="#fn:181">181</a> Had Discovery been unable to safely land, the crew would have remained on the ISS until Atlantis was flown to rescue them.<a class="footnote-ref" id="fnref:182" href="#fn:182">182</a> As a result of the foam loss, NASA grounded the Space Shuttle fleet again.<a class="footnote-ref" id="fnref:183" href="#fn:183">183</a><a class="footnote-ref" id="fnref:184" href="#fn:184">184</a>

<h3>Second Return to Flight mission (STS-121)</h3>
Main article: <a href="/facts/STS-121/MgbcDT59">STS-121</a>
To address the problem of foam loss for the second Return to Flight mission (<a href="/facts/STS-121/MgbcDT59">STS-121</a>), NASA engineers removed the foam ramp from the protuberance air load (PAL) on the ET, which was the source of the largest piece of debris on STS-114.<a class="footnote-ref" id="fnref:185" href="#fn:185">185</a> The launch was postponed from its scheduled launch of July 1, 2006, and again on July 2 due to inclement weather at KSC.<a class="footnote-ref" id="fnref:186" href="#fn:186">186</a> On July 3 a piece of foam approximately 3 by .25 inches (7.62 by 0.64 cm) and weighing 0.0057 pounds (2.6 g) broke off from the ET.<a class="footnote-ref" id="fnref:187" href="#fn:187">187</a><a class="footnote-ref" id="fnref:188" href="#fn:188">188</a> The mission still launched as scheduled at 2:38 pm (EDT) on July 4.<a class="footnote-ref" id="fnref:189" href="#fn:189">189</a> After reaching orbit, Discovery performed post-launch inspections of its TPS and docked with the ISS on July 6.<a class="footnote-ref" id="fnref:190" href="#fn:190">190</a> The orbiter carried a 28 feet (8.5 m) remote control orbiter in-flight maintenance cable that could connect the flight deck systems to the avionics system in the mid-deck; it would allow the spacecraft to be landed remotely, to include controlling the <a href="/facts/Landing_gear/MGt7HeAf">landing gear</a> and deploying the <a href="/facts/Drogue_parachute/tjfpn1Ls">parachute</a>.<a class="footnote-ref" id="fnref:191" href="#fn:191">191</a><a class="footnote-ref" id="fnref:192" href="#fn:192">192</a> On July 12 astronauts <a href="/facts/Piers_Sellers/9gsXWTDj">Piers Sellers</a> and <a href="/facts/Michael_Fossum/QwMvh0e3">Michael Fossum</a> performed an EVA to test the NonOxide Adhesive eXperiment (NOAX), which applied protective sealant to samples of damaged TPS tiles.<a class="footnote-ref" id="fnref:193" href="#fn:193">193</a>: 70  Discovery undocked from the ISS on July 14 and safely landed at 9:14 am on July 17 at KSC.<a class="footnote-ref" id="fnref:194" href="#fn:194">194</a> Had the crew been stranded in orbit, NASA planned to launch Atlantis to rescue them from the ISS.<a class="footnote-ref" id="fnref:195" href="#fn:195">195</a><a class="footnote-ref" id="fnref:196" href="#fn:196">196</a>

<h3>Program cancellation</h3>
In January 2004 President Bush announced the <a href="/facts/Vision_for_Space_Exploration/FY56Inv6">Vision for Space Exploration</a>, calling for the Space Shuttle fleet to complete the ISS and be retired by 2010, to be replaced by a newly developed <a href="/facts/Crew_Exploration_Vehicle/aU3ltbmf">Crew Exploration Vehicle</a> for travel to the Moon and Mars.<a class="footnote-ref" id="fnref:197" href="#fn:197">197</a> In 2004, NASA Administrator Sean O'Keefe canceled a planned servicing of the <a href="/facts/Hubble_Space_Telescope/NQeIf0vw">Hubble Space Telescope</a> and decided that future missions would all rendezvous with the ISS to ensure the safety of the crew.<a class="footnote-ref" id="fnref:198" href="#fn:198">198</a> In 2006, his successor, <a href="/facts/Michael_D._Griffin/hXGBWnnc">Michael Griffin</a>, decided to have one more servicing mission to the telescope, <a href="/facts/STS-125/epWDLLKH">STS-125</a>, which flew in May 2009.<a class="footnote-ref" id="fnref:199" href="#fn:199">199</a><a class="footnote-ref" id="fnref:200" href="#fn:200">200</a> The <a href="/facts/Space_Shuttle_retirement/XtqS0N5n">retirement of the Space Shuttle</a> was delayed until 2011,<a class="footnote-ref" id="fnref:201" href="#fn:201">201</a><a class="footnote-ref" id="fnref:202" href="#fn:202">202</a> after which no further crewed spacecraft were launched from the United States until 2020 when <a href="/facts/SpaceX/2tKHsVdJ">SpaceX</a>'s <a href="/facts/Crew_Dragon_Demo-2/0D3BuCxE">Crew Dragon Demo-2</a> mission successfully carried NASA astronauts <a href="/facts/Doug_Hurley/tMoKCnVV">Doug Hurley</a> and <a href="/facts/Robert_Behnken/Nd3ExBdm">Robert Behnken</a> to the ISS.<a class="footnote-ref" id="fnref:203" href="#fn:203">203</a>

<h2 id="legacy">Legacy</h2>

On February 4, 2003, President <a href="/facts/George_W._Bush/mYSgM515">Bush</a> and his wife <a href="/facts/Laura_Bush/fK8FNdyp">Laura</a> led a memorial service for the astronauts' families at the <a href="/facts/Johnson_Space_Center/rN6Jvhqe">Johnson Space Center</a>. Two days later, Vice President <a href="/facts/Dick_Cheney/7EUs9oQV">Dick Cheney</a> and his wife <a href="/facts/Lynne_Cheney/8dNj4wyU">Lynne</a> led a similar service at <a href="/facts/Washington_National_Cathedral/Vrytpzc4">Washington National Cathedral</a>. <a href="/facts/Patti_LaBelle/2l4rNkcB">Patti LaBelle</a> sang "Way Up There" as part of the service.<a class="footnote-ref" id="fnref:204" href="#fn:204">204</a> A memorial service was held at KSC on February 7; <a href="/facts/Robert_Crippen/hm6D5Cqj">Robert Crippen</a>, the first pilot of Columbia, gave a eulogy for the crew and a tribute for Columbia herself, acknowledging her achievements as the first orbiter and NASA's flagship, her role in trying desperately to save the crew on STS-107, and her many missions dedicated to scientific research.<a class="footnote-ref" id="fnref:205" href="#fn:205">205</a>: 155  On October 28, 2003, the names of the crew were added to the <a href="/facts/Space_Mirror_Memorial/3Hkh8PJU">Space Mirror Memorial</a> at the <a href="/facts/Kennedy_Space_Center_Visitor_Complex/1dcnSn7u">KSC Visitor Complex</a> in <a href="/facts/Merritt_Island%2c_Florida/xT3Takm3">Merritt Island, Florida</a>, alongside the names of 17 other astronauts and cosmonauts who have died in the line of duty.<a class="footnote-ref" id="fnref:206" href="#fn:206">206</a> On February 2, 2004, NASA Administrator O'Keefe unveiled a memorial for the STS-107 crew at <a href="/facts/Arlington_National_Cemetery/bMHJMwCm">Arlington National Cemetery</a>, and it is located near the Challenger memorial.<a class="footnote-ref" id="fnref:207" href="#fn:207">207</a> A tree for each astronaut was planted in NASA's Astronaut Memorial Grove at the Johnson Space Center, along with trees for each astronaut from the <a href="/facts/Apollo_1/aJEvDnBM">Apollo 1</a> and Challenger disasters.<a class="footnote-ref" id="fnref:208" href="#fn:208">208</a> The exhibit Forever Remembered at KSC Visitor Complex features the cockpit window frames from Columbia.<a class="footnote-ref" id="fnref:209" href="#fn:209">209</a> In 2004, Bush conferred posthumous <a href="/facts/Congressional_Space_Medal_of_Honor/m63rYu3x">Congressional Space Medals of Honor</a> to all 14 crew members killed in the Challenger and Columbia accidents.<a class="footnote-ref" id="fnref:210" href="#fn:210">210</a>
NASA named several places in honor of Columbia and the crew. Seven <a href="/facts/Asteroid/g7Ulr1VB">asteroids</a> discovered in July 2001 were named after astronauts: <a href="/facts/51823_Rickhusband/dW8bJALn">51823 Rickhusband</a>, <a href="/facts/51824_Mikeanderson/WBUjQpXJ">51824 Mikeanderson</a>, <a href="/facts/51825_Davidbrown/xFu5NRAz">51825 Davidbrown</a>, <a href="/facts/51826_Kalpanachawla/rVI4q91m">51826 Kalpanachawla</a>, <a href="/facts/51827_Laurelclark/foyu1xsF">51827 Laurelclark</a>, <a href="/facts/51828_Ilanramon/p4jIlVbv">51828 Ilanramon</a>, <a href="/facts/51829_Williemccool/PzL2dgRV">51829 Williemccool</a>.<a class="footnote-ref" id="fnref:211" href="#fn:211">211</a> On <a href="/facts/Mars/AQGtVvz0">Mars</a>, the landing site of the <a href="/facts/Mars_Exploration_Rover_Mission/74WxIsHS">rover</a> <a href="/facts/Spirit_(rover)/qNWFPqzj">Spirit</a> was named Columbia Memorial Station, and included a memorial plaque to the Columbia crew mounted on the back of the high gain antenna.<a class="footnote-ref" id="fnref:212" href="#fn:212">212</a> A complex of seven hills east of the Spirit landing site was dubbed the <a href="/facts/Columbia_Hills_(Mars)/2HhTLH7t">Columbia Hills</a>; each of the seven hills was individually named for a member of the crew,<a class="footnote-ref" id="fnref:213" href="#fn:213">213</a> and the rover explored the summit of <a href="/facts/Husband_Hill/7uSkjE7N">Husband Hill</a> in 2005.<a class="footnote-ref" id="fnref:214" href="#fn:214">214</a> In 2006, the <a href="/facts/International_Astronomical_Union/GMFPImXo">IAU</a> approved naming seven lunar craters after the astronauts.<a class="footnote-ref" id="fnref:215" href="#fn:215">215</a>
In February 2006, NASA's National Scientific Balloon Facility was renamed the <a href="/facts/Columbia_Scientific_Balloon_Facility/7FNjawGa">Columbia Scientific Balloon Facility</a>.<a class="footnote-ref" id="fnref:216" href="#fn:216">216</a> A <a href="/facts/Supercomputer/HT9NwGAN">supercomputer</a> built in 2004 at the <a href="/facts/NASA_Advanced_Supercomputing_Division/ImR5s5vz">NASA Advanced Supercomputing Division</a> was named "<a href="/facts/Columbia_(supercomputer)/BFgX6xBg">Columbia</a>".<a class="footnote-ref" id="fnref:217" href="#fn:217">217</a> The first part of the system, named "<a href="/facts/Kalpana_(supercomputer)/GL8DDGRq">Kalpana</a>", was dedicated to Chawla, who had worked at the <a href="/facts/Ames_Research_Center/DQUsdLam">Ames Research Center</a> before joining the Space Shuttle program.<a class="footnote-ref" id="fnref:218" href="#fn:218">218</a> The first dedicated meteorological satellite launched by the <a href="/facts/Indian_Space_Research_Organisation/CdAoFQTL">Indian Space Research Organisation</a> (ISRO), Metsat-1, was renamed to <a href="/facts/Kalpana-1/uQzgona4">Kalpana-1</a> on February 5, 2003, after Chawla.<a class="footnote-ref" id="fnref:219" href="#fn:219">219</a><a class="footnote-ref" id="fnref:220" href="#fn:220">220</a>
In 2003, the airport in <a href="/facts/Amarillo%2c_Texas/bQW8vxU7">Amarillo, Texas</a>, where Husband was from, was renamed to the <a href="/facts/Rick_Husband_Amarillo_International_Airport/TRqzU3yW">Rick Husband Amarillo International Airport</a>.<a class="footnote-ref" id="fnref:221" href="#fn:221">221</a> A mountain peak in the <a href="/facts/Sangre_de_Cristo_Range/MAUNsce0">Sangre de Cristo Range</a> in the <a href="/facts/Southern_Rocky_Mountains/ef1xA0eM">Colorado Rockies</a> was renamed <a href="/facts/Columbia_Point/IfYJCRc8">Columbia Point</a> in 2003.<a class="footnote-ref" id="fnref:222" href="#fn:222">222</a> In October 2004, both houses of Congress passed a resolution to change the name of <a href="/facts/Downey%2c_California/mKgcxgEM">Downey, California</a>'s Space Science Learning Center to the <a href="/facts/Columbia_Memorial_Space_Center/6cNFmCBc">Columbia Memorial Space Center</a>, which is located at the former manufacturing site of the Space Shuttle orbiters.<a class="footnote-ref" id="fnref:223" href="#fn:223">223</a><a class="footnote-ref" id="fnref:224" href="#fn:224">224</a>
On April 1, 2003, the <a href="/facts/Opening_Day/1ALyQurW">Opening Day</a> of baseball season, the <a href="/facts/Houston_Astros/YVwXLuEM">Houston Astros</a> honored the Columbia crew by having seven simultaneous <a href="/facts/Ceremonial_first_pitch/3JAzPvqj">first pitches</a> thrown by family and friends of the crew. During the singing of the <a href="/facts/The_Star-Spangled_Banner/GrMnRnSd">national anthem</a>, 107 NASA personnel carried a U.S. flag onto the field.<a class="footnote-ref" id="fnref:225" href="#fn:225">225</a> The Astros wore the mission patch on their sleeves the <a href="/facts/2003_Houston_Astros_season/A2JdxWGg">entire season</a>.<a class="footnote-ref" id="fnref:226" href="#fn:226">226</a> On February 1, 2004, the first anniversary of the Columbia disaster, <a href="/facts/Super_Bowl_XXXVIII/Nva3hDpR">Super Bowl XXXVIII</a> held in Houston's <a href="/facts/NRG_Stadium/GRKDvrhl">Reliant Stadium</a> began with a pregame tribute to the crew of the Columbia by singer <a href="/facts/Josh_Groban/TfGt8K3Q">Josh Groban</a> performing "<a href="/facts/You_Raise_Me_Up/er83zMrd">You Raise Me Up</a>", with the crew of STS-114 in attendance.<a class="footnote-ref" id="fnref:227" href="#fn:227">227</a><a class="footnote-ref" id="fnref:228" href="#fn:228">228</a>
In 2004, two space journalists, Michael Cabbage and William Harwood, released their book, Comm Check: The Final Flight of Shuttle Columbia. It discusses the history of the Space Shuttle program, and documents the post-disaster recovery and investigation efforts.<a class="footnote-ref" id="fnref:229" href="#fn:229">229</a> Michael Leinbach, a retired <a href="/facts/Launch_Control_Center/7K5CweED">Launch Director</a> at KSC who was working on the day of the disaster, released Bringing Columbia Home: The Untold Story of a Lost Space Shuttle and Her Crew in 2018. It documents his personal experience during the disaster, and the debris and remains recovery efforts.<a class="footnote-ref" id="fnref:230" href="#fn:230">230</a><a class="footnote-ref" id="fnref:231" href="#fn:231">231</a>
In 2004, the documentary <a href="/facts/Columbia%3a_The_Tragic_Loss/lsckW5Lo">Columbia: The Tragic Loss</a> was released; it told of the life of Ilan Ramon and focused on the issues in NASA management that led to the disaster.<a class="footnote-ref" id="fnref:232" href="#fn:232">232</a> <a href="/facts/PBS/E6q9udH8">PBS</a> released a <a href="/facts/Nova_(American_TV_program)/yRj6GvQB">Nova</a> documentary, Space Shuttle Disaster, in 2008. It featured commentary from NASA officials and space experts, and discussed historical issues with the spacecraft and NASA.<a class="footnote-ref" id="fnref:233" href="#fn:233">233</a>
The Scottish Celtic-Rock band <a href="/facts/Runrig/QePsnmL3">Runrig</a> included a song titled "Somewhere" on their album <a href="/facts/The_Story_(Runrig_album)/Mgd1HsTA">The Story</a> that ends with a recording of a radio communication from Laurel Clark. Clark, who had become a fan of the band when she lived in Scotland, had a Runrig song "Running to the Light" play as her wakeup music on January 27; her CD of <a href="/facts/The_Stamping_Ground/1kUmeb53">The Stamping Ground</a> was recovered in the debris and presented to the band by Clark's husband and son.<a class="footnote-ref" id="fnref:234" href="#fn:234">234</a><a class="footnote-ref" id="fnref:235" href="#fn:235">235</a><a class="footnote-ref" id="fnref:236" href="#fn:236">236</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Criticism_of_the_Space_Shuttle_program/CVMVhbb5">Criticism of the Space Shuttle program</a></li>
<li><a href="/facts/Engineering_disasters/WpV2zR8r">Engineering disasters</a></li>
<li><a href="/facts/Expedition_6/H1reIN09">Expedition 6</a></li>
<li><a href="/facts/List_of_spaceflight-related_accidents_and_incidents/yoI0cEQd">List of spaceflight-related accidents and incidents</a></li></ul>
<h2 id="notes">Notes</h2>

<ul><li> This article incorporates <a href="https://www.jsc.nasa.gov/policies.html#Guidelines">public domain material</a> from websites or documents of the <a href="/facts/National_Aeronautics_and_Space_Administration/TIMCV0yV">National Aeronautics and Space Administration</a>.</li></ul>
<h2 id="external-links">External links</h2>

Wikimedia Commons has media related to Space Shuttle Columbia disaster.

<a href="/facts/Wikisource/TrMdylNf">Wikisource</a> has original text related to this article:
Columbia Settlement

<ul><li><a href="https://www.nasa.gov/columbia/home/index.html">NASA's Space Shuttle Columbia and her crew</a></li>
<li><a href="https://www.youtube.com/watch?v=PrAZK8mxAGk">Doppler radar animation of the debris after break up</a></li>
<li><a href="https://georgewbush-whitehouse.archives.gov/news/releases/2003/02/20030204-1.html">President Bush's remarks at memorial service</a> (February 4, 2003)</li>
<li><a href="http://www.cbsnews.com/network/news/space/SRH_Disasters.htm">The CBS News Space Reporter's Handbook STS-51L/107 Supplement</a></li>
<li><a href="https://web.archive.org/web/20160513025046/http://space.webtvselector.com/wiki_colombia_cockpit.htm">The 13-min. Crew cabin video (subtitled). Ends 4-min. before the Shuttle began to disintegrate.</a></li>
<li><a href="http://www.collectspace.com/news/news-020104a.html">Photos of recovered debris stored on the 16th floor of the Vehicle Assembly Building at KSC</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Rogers, William P.; Armstrong, Neil A.; Acheson, David C.; Covert, Eugene E.; Feynman, Richard P.; Hotz, Robert B.; Kutyna, Donald J.; Ride, Sally K; Rummel, Robert W.; Sutter, Joseph F.; Walker, Arthur B.C.; Wheelon, Albert D.; Yeager, Charles E. (June 6, 1986). Report of the Presidential Commission on the Space Shuttle Challenger Accident (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on October 18, 2020. Retrieved July 13, 2021. <a href="/wiki/William_P._Rogers" target="_blank">/wiki/William_P._Rogers</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Rogers, William P.; Armstrong, Neil A.; Acheson, David C.; Covert, Eugene E.; Feynman, Richard P.; Hotz, Robert B.; Kutyna, Donald J.; Ride, Sally K; Rummel, Robert W.; Sutter, Joseph F.; Walker, Arthur B.C.; Wheelon, Albert D.; Yeager, Charles E. (June 6, 1986). Report of the Presidential Commission on the Space Shuttle Challenger Accident (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on October 18, 2020. Retrieved July 13, 2021. <a href="/wiki/William_P._Rogers" target="_blank">/wiki/William_P._Rogers</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Baker, David (2011). NASA Space Shuttle: Owners' Workshop Manual. Somerset, UK: Zenith Press. ISBN 978-1844258666. <a href="978-1844258666" target="_blank">978-1844258666</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Jenkins, Dennis R. (2016). Space Shuttle: Developing an Icon – 1972–2013. Forest Lake: Specialty Press. ISBN 978-1580072496. <a href="978-1580072496" target="_blank">978-1580072496</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Jenkins, Dennis R. (2001). Space Shuttle: The History of the National Space Transportation System. Stillwater: Voyageur Press. ISBN 978-0963397454. <a href="978-0963397454" target="_blank">978-0963397454</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">"External Tank Return to Flight Focus Area:Forward Bipod Fitting" (PDF). NASA. August 2004. Archived (PDF) from the original on November 4, 2021. Retrieved January 19, 2022. <a href="https://www.nasa.gov/pdf/63908main_Bipod_Fact_Sheet.pdf" target="_blank">https://www.nasa.gov/pdf/63908main_Bipod_Fact_Sheet.pdf</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">No foam shedding was ever observed from the right bipod ramp. In its report, the CAIB hypothesized that this is because of the ET's liquid oxygen line, which partially shielded the right strut from aerodynamic forces. <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
<li id="fn:26">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></li>
<li id="fn:27">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></li>
<li id="fn:28">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></li>
<li id="fn:29">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></li>
<li id="fn:30">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></li>
<li id="fn:31">"Rick Douglas Husband". NASA. February 2003. Archived from the original on August 11, 2020. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/ASTRON~2.HTM" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/ASTRON~2.HTM</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></li>
<li id="fn:32">"William C. McCool". NASA. February 2003. Archived from the original on July 14, 2019. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/McCool%20Astronaut%20Bio%20Data.htm" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/McCool%20Astronaut%20Bio%20Data.htm</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></li>
<li id="fn:33">"Michael P. Anderson". NASA. February 2003. Archived from the original on July 14, 2019. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/anderson_biodata.htm" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/anderson_biodata.htm</a> <a href="#fnref:33" class="footnote-back-ref">↩</a></li>
<li id="fn:34">"Kalpana Chawla" (PDF). NASA. May 2004. Archived (PDF) from the original on December 29, 2021. Retrieved January 25, 2022. <a href="https://www.nasa.gov/sites/default/files/atoms/files/chawla_kalpana.pdf" target="_blank">https://www.nasa.gov/sites/default/files/atoms/files/chawla_kalpana.pdf</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></li>
<li id="fn:35">"David M. Brown". NASA. February 2003. Archived from the original on July 14, 2019. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/Brown%20Astronaut%20Bio%20Data.htm" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/Brown%20Astronaut%20Bio%20Data.htm</a> <a href="#fnref:35" class="footnote-back-ref">↩</a></li>
<li id="fn:36">"Laurel Blair Salton Clark". NASA. February 2003. Archived from the original on July 14, 2019. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/Clark%20Astronaut%20Bio%20Data.htm" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/Clark%20Astronaut%20Bio%20Data.htm</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></li>
<li id="fn:37">"Ilan Ramon". NASA. February 2003. Archived from the original on July 14, 2019. Retrieved January 25, 2022. <a href="https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/PAYLOA~1.HTM" target="_blank">https://history.nasa.gov/columbia/Troxell/Columbia%20Web%20Site/Biographies/Crew%20Profile%20Information/Crew%20Biographies/PAYLOA~1.HTM</a> <a href="#fnref:37" class="footnote-back-ref">↩</a></li>
<li id="fn:38">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:38" class="footnote-back-ref">↩</a></li>
<li id="fn:39">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:39" class="footnote-back-ref">↩</a></li>
<li id="fn:40">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:40" class="footnote-back-ref">↩</a></li>
<li id="fn:41">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:41" class="footnote-back-ref">↩</a></li>
<li id="fn:42">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></li>
<li id="fn:43">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></li>
<li id="fn:44">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></li>
<li id="fn:45">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:45" class="footnote-back-ref">↩</a></li>
<li id="fn:46">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:46" class="footnote-back-ref">↩</a></li>
<li id="fn:47">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:47" class="footnote-back-ref">↩</a></li>
<li id="fn:48">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:48" class="footnote-back-ref">↩</a></li>
<li id="fn:49">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:49" class="footnote-back-ref">↩</a></li>
<li id="fn:50">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:50" class="footnote-back-ref">↩</a></li>
<li id="fn:51">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:51" class="footnote-back-ref">↩</a></li>
<li id="fn:52">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:52" class="footnote-back-ref">↩</a></li>
<li id="fn:53">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:53" class="footnote-back-ref">↩</a></li>
<li id="fn:54">Gehman, Harold; Barry, John; Deal, Duane; Hallock, James; Hess, Kenneth; Hubbard, G. Scott; Logsdon, John; Osheroff, Douglas D.; Ride, Sally; Tetrault, Roger; Turcotte, Stephen; Wallace, Steven; Widnall, Sheila (August 26, 2003). Report of Columbia Accident Investigation Board (PDF) (Report). Vol. 1. NASA. Archived (PDF) from the original on May 5, 2021. Retrieved August 15, 2022. <a href="/wiki/Harold_W._Gehman_Jr." target="_blank">/wiki/Harold_W._Gehman_Jr.</a> <a href="#fnref:54" class="footnote-back-ref">↩</a></li>
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</ol>

Space Shuttle Columbia disaster open-in-new

Space Shuttle Columbia disaster