David Kirkpatrick, Cairo bureau chief, The New York Times
Amb. Christopher Hill, former ambassador to Iraq
Lt. Gen. David Barno, overall commander in Afghanistan from 2003-2005
Since the U.S. consulate in Benghazi, Libya was attacked on Sept. 11, 2012, many questions have been raised about security at the consulate, and whether the U.S. military or Central Intelligence Agency could have done more to protect the Americans there.