DETROIT — A Nigerian man pleaded guilty Wednesday to trying to bring down a jetliner with a bomb in his underwear, defiantly telling a federal judge that he acted in retaliation for the killing of Muslims worldwide and referring to the failed explosive as a "blessed weapon."
Umar Farouk Abdulmutallab, who acknowledged working for al Qaeda and never denied the allegations, entered the plea against his attorney's advice on the second day of his trial. He stands to get a mandatory life sentence for the 2009 attack that aimed to kill nearly 300 people on Christmas Day in the skies above Detroit.
Abdulmutallab calmly answered the judge's questions and read a political statement, warning that if the United States continues "to persist and promote the blasphemy of Muhammad and the prophets," it risks "a great calamity through the hands of the mujahedeen soon."
"If you laugh at us now, we will laugh at you later on the day of judgment," he said.
Abdulmutallab suggested more than a year ago that he wanted to plead guilty but never did. He dropped his four-person, publicly financed defense team in favor of representing himself with help from a prominent local lawyer appointed by the court, Anthony Chambers.
After the prosecution gave its opening statement Tuesday, Mr. Chambers declined to give one for the defense, preferring to save it for later in the trial. Outside court Wednesday, he said he had urged his client not to admit anything.
"We wanted to continue the trial, but we respect his decision," Mr. Chambers said.
Passenger Lori Haskell of Newport, Mich., watched the plea by video from a room near the court. She called Abdulmutallab's statement "chilling" but not surprising. "I'm just really relieved that it's done with," she said.
The Amsterdam-to-Detroit flight was just moments away from landing when Abdulmutallab tried to detonate the bomb in his pants. It failed to go off, but his clothes caught fire, and passengers jumped on him when they saw smoke and flame.
The evidence was stacked high.
The government says Abdulmutallab willingly explained the plot twice, first to U.S. border officers who took him off the plane and then in more detail to FBI agents who interviewed him at a hospital after he was treated for burns to his groin.
There were also photos of his scorched shorts, video of Abdulmutallab explaining his suicide mission before departing for the U.S. and scores of passengers who could have been called as eyewitnesses.
Abdulmutallab, who told the judge he is 25, pleaded guilty to all eight charges, including conspiracy to commit terrorism and attempted use of a weapon of mass destruction. He is scheduled to be sentenced Jan. 12.
• AP writers David Runk, Jeff Karoub and Matt Apuzzo contributed to this report.