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Program 437
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<p>Program 437 was the second <a href="/facts/Anti-satellite_weapon/vd3acxFt">anti-satellite</a> weapons program of the <a href="/facts/Military_of_the_United_States/NHVsU9Id">U.S. military</a>. The US anti-satellite weapons program began development in the early 1960s and was officially discontinued on 1 April 1975. Program 437 was approved for development by <a href="/facts/United_States_Secretary_of_Defense/K3ygWDbv">U.S. Secretary of Defense</a> <a href="/facts/Robert_McNamara/pcfqvcDq">Robert McNamara</a> on November 20, 1962, after a series of tests involving <a href="/facts/High_altitude_nuclear_explosion/UdNALFgT">high altitude nuclear explosions</a>. The program's facilities were located on <a href="/facts/Johnston_Island/xAdQlUQR">Johnston Island</a>, an isolated island in the north central <a href="/facts/Pacific_Ocean/bdxgXRVM">Pacific Ocean</a>. </p>