Umar Farouk Mohammed is sentenced to life in prison . AbdulMutallab argued a life sentence would be unconstitutional . Mohammed hid a bomb in his underwear aboard a commercial airliner . Prosecutors , however , said the case demonstrated the value of civilian courts . The attempted bombing occurred on Christmas Eve 2009 .
Umar Farouk Mohammed is sentenced to life in prison . AbdulMutallab argued a life sentence would be unconstitutional . Mohammed hid a bomb in his underwear aboard a commercial airliner . The attempted bombing occurred on Christmas Eve 2009 .