A number of sources reported contacts between Abdulmutallab and Anwar al-Awlaki, an American Yemeni Muslim lecturer and spiritual leader who had been accused of being a senior al-Qaeda talent recruiter and motivator. Al-Awlaki, who was killed by an unmanned United States drone in Yemen in September 2011, was previously an imam in the U.S. He was associated with three of the 9/11 hijackers, who prayed at his mosque; the 2005 London Bombings; a 2006 Toronto terror cell; a 2007 Fort Dix attack plot; and the 2009 Fort Hood shooter.