Umar Farouk AbdulMutallab is sentenced to life in prison . AbdulMutallab argued a life sentence would be unconstitutional . AbdulMutallab smuggled a bomb in his underwear aboard a commercial airliner . He was able to detonate the device on board and kill himself, but it caused an explosion that killed all 329 people on board.
Umar Farouk AbdulMutallab is sentenced to life in prison . AbdulMutallab argued a life sentence would be unconstitutional . AbdulMutallab smuggled a bomb in his underwear aboard a commercial airliner . The attempted bombing occurred on Christmas Day 2009 .