John Christopher Stevens was an American career diplomat and lawyer who served as the U.S. Ambassador to Libya from May 22, 2012, to September 11, 2012. Stevens was killed when the U.S. Special Mission in Benghazi, Libya, was attacked by members of Ansar al-Sharia on September 11–12, 2012., making Stevens the eighth and most recent U.S. Ambassador to be killed while in office.