Christopher Stevens

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House Select Committee on Benghazi Chairman Rep. Trey Gowdy, R-S.C., demands answers of witnesses from the State Department and the CIA, as it holds its third public hearing to investigate the 2012 attacks on the U.S. consulate in Benghazi, Libya, where a violent mob killed four Americans, including Ambassador Christopher Stevens, Tuesday, Jan. 27, 2015, on Capitol Hill in Washington. (AP Photo/J. Scott Applewhite)

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**FILE** In this photo posted on the U.S. Embassy Tripoli Facebook page on Aug. 27, 2012, Christopher Stevens (left), U.S. Ambassador to Libya, shakes hands with a Libyan man in Tripoli, Libya. (Associated Press/U. S. Embassy Tripoli)

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**FILE** Aides bearing armfuls of papers arrive Oct. 10, 2012, on Capitol Hill with witnesses from the State Department for the House Oversight and Government Reform Committee hearing investigating the Sept. 11 attack on the American consulate in Benghazi, Libya, that resulted in the death of U.S. Ambassador Christopher Stevens and other Americans. (Associated Press)

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** FILE ** House Oversight Committee Chairman Rep. Darrell Issa, California Republican, delivers his opening statement Oct. 10, 2012, on Capitol Hill during the committee's hearing on the Sept. 11 attack on the U.S. Consulate in Benghazi, Libya, that resulted in the death of U.S. Ambassador Christopher Stevens. (Associated Press)

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**FILE** Secretary of State Hillary Clinton looks on as President Obama delivers a statement Sept. 12, 2012, in the Rose Garden of the White House on the death of Christopher Stevens, U.S. ambassador to Libya. (Associated Press)

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**FILE** White House workers walk on the roof of the White House on Sept. 12, 2012, after lowering the flag to half-staff for the death of U.S. ambassador to Libya Christopher Stevens. (Associated Press)

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House Oversight Committee Chairman Rep. Darrell Issa, California Republican, arrives on Capitol Hill in Washington, Wednesday, Oct. 10, 2012, for a hearing on the attack on the American consulate in Benghazi, Libya that resulted in the death of U.S. Ambassador Christopher Stevens. (AP Photo/J. Scott Applewhite)

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Secretary of State Hillary Rodham Clinton listens as President Obama speaks Sept. 12, 2012, in the Rose Garden of the White House in Washington on the death of Christopher Stevens, U.S. ambassador to Libya. (Associated Press)