 Complete the following phrase:  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 911 hijackers, who prayed at his mosque; the 2005 London Bombings; a 2006 Toronto terror cell; a 2007 Fort Dix attack plot; and the 2009 