US Ambassador Christopher Stevens

U.S. envoy Chris Stevens stands in the lobby of the Tibesty Hotel where an African Union delegation was meeting with opposition leaders in Benghazi, Libya. (April 2011 file photo)

John Christopher Stevens, newly appointed U.S. ambassador to Libya, shakes hands with Libyan National Transitional Council (NTC) chairman Mustafa Abdel Jalil (R) after presenting his credentials during a meeting in Tripoli, June 7, 2012.

French military personnel try to control supporters who are asking them to disarm fighting gangs, near the airport in Bangui, Central African Republic. France appealed to European partners for assistance in quelling months of religious violence in its former colony.

French military personnel try to control supporters who are asking them to disarm fighting gangs, near the airport in Bangui, Central African Republic. France appealed to European partners for assistance in quelling months of religious violence in its former colony.

French military personnel try to control supporters who are asking them to disarm fighting gangs, near the airport in Bangui, Central African Republic. France appealed to European partners for assistance in quelling months of religious violence in its former colony.

US diplomatic envoy to rebel held Libya Chris Stevens (R), Britain's diplomatic representative Christopher Prentice (L) and deputy chairman of the TNC Abdul Hafiz Ghoqa (C) hold candles during a memorial service for slain photojournalists Tim Hetherington.