In this photo taken Monday, April 11, 2011, then U.S. envoy Chris Stevens, right, is accompanied by an unidentified member of security personnel, left, as he attends meetings at the Tibesty Hotel where an African Union delegation was meeting with opposition leaders in Benghazi, Libya. Libyan officials say the U.S. ambassador and three other Americans have been killed in an attack on the U.S. consulate in the eastern city of Benghazi by protesters angry over a film that ridiculed Islam's Prophet Muhammad. (AP Photo/Ben Curtis) (Ben Curtis / Associated Press)
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