The government acknowledged that US drone strikes have killed four US citizens in Pakistan and Yemen, including Anwar al Awlaki, who planned a jetliner bombing over Detroit in 2009 and had a key role in a 2010 plot to bomb US-bound cargo planes. Ibragim Todashev, a Chechen acquaintance of Boston Marathon bombing suspect Tamerlan Tsarnaev, was shot dead by an FBI agent in Orlando, Fla. after lunging with a knife at the agent during questioning; the former Boston resident was being questioned by the FBI about links to Tsarnaev as well as an unsolved triple murder in 2011, and planned on returning to Chechnya. The US is said to be looking at more than five suspects in the September 2012 Benghazi attack.
