In just the second day of his trial, the so-called "underwear bomber" changes his plea. Umar Farouk Abdulmutallab - the Nigerian man accused of trying to blow up a U.S. airplane on Christmas Day in 2009 -- tells a federal judge that he is in fact guilty of all charges against him. Attorney Anthony Chambers assisted in his defense. SOUNDBITE: ATTORNEY ANTHONY CHAMBERS, SAYING (English) "It was his decision to enter into the plea of guilty today. It is a decision that was against the advise of counsel but it is a decision that he chose to make and he believed to be the right thing to do today based upon his own feelings. --EDIT--We wanted to continue the trial but we respect his decision. Certainly, no lawyer I think worth his weight in salt would recommend a plea to life without parole." The 24-year-old told the judge he was fulfilling a quote..."religious duty" and warned the United States could face what he called "a great calamity." Abdulmutallab was accused of trying to bomb a Northwest Airlines jet bound from Amsterdam to Detroit by detonating a bomb hidden in his underwear. He was charged with eight felonies, including conspiracy to commit an act of terrorism, attempted murder and attempted use of a weapon of mass destruction. He faces possible life in prison -- and will be sentenced on January 12. Al Qaeda's Yemen-based group has also claimed responsibility for the failed attack. Sarah Irwin, Reuters.