** FILE ** In this Wednesday, Sept. 12, 2012, file photo, Libyans walk on the grounds of the gutted U.S. consulate in Benghazi, Libya, after an attack the previous day that killed four Americans, including U.S. Ambassador J. Christopher Stevens. (AP Photo/Ibrahim Alaguri)

** FILE ** In this Wednesday, Sept. 12, 2012, file photo, Libyans walk on the grounds of the gutted U.S. consulate in Benghazi, Libya, after an attack the previous day that killed four Americans, including U.S. Ambassador J. Christopher Stevens. (AP Photo/Ibrahim Alaguri)