Umar Farouk Abdulmutallab popularly referred to as the "Underwear Bomber" or "Christmas Bomber", is a Nigerian terrorist who attempted to detonate plastic explosives hidden in his underwear while on board Northwest Airlines Flight 253, en route from Amsterdam to Detroit, Michigan, U.S. on 25 December 2009.
Al-Qaeda in the Arabian Peninsula (AQAP) claimed to have organised the attack with Abdulmutallab; they said they supplied him with the bomb and trained him. Connections to al-Qaeda and Anwar al-Awlaki have been found, although the latter denied ordering the bombing.
Abdulmutallab was convicted in a U.S. federal court of eight federal criminal counts, including attempted use of a weapon of mass destruction and attempted murder of 289 people. On 16 February 2012, he was sentenced to 4 life terms plus 50 years without parole. He is incarcerated at ADX Florence, the supermax federal prison in Colorado.