A Nigerian man who tried to bomb a flight to the United States on Christmas Day 2009 has been sentenced to life in prison without parole.
Umar Farouk Abdulmutallab, 25, known as the underwear bomber, pleaded guilty in October to eight charges, including attempting to blow up a plane.
The bomb caused a fire but failed to explode on a Delta Airlines flight carrying 289 people to Detroit.
Despite stringent security measures at airports, Abdulmutallab smuggleg 76 grams of Pentaerythritol tetranitrate on board the flight from Amsterdam.
US District Judge Nancy Edmunds in Detroit on Thursday imposed the maximum sentence allowed, saying this was an act of terrorism that cannot be quibbled with.