PM UPDATE: Underwear bomber Umar Farouk Abdulmutallab has pleaded guilty to all the terrorism charges against him in a federal court in Detroit. The Nigerian nutcase's dramatic plea quickly ends the high-profile trial. The 25-year-old wannabe al-Qaida killer was facing life in a federal pen on charges of attempted murder, attempted use of weapons of mass destruction and conspiracy to commit terrorism. The Underwear Bomber was hammered into the national conscience on Christmas Day 2009 when he 