FILE - In this Wednesday, Sept. 12, 2012 file photo, Secretary of State Hillary Clinton looks on as President Barack Obama delivers a statement on the death of U.S. ambassador to Libya

 

              FILE - In this Wednesday, Sept. 12, 2012 file photo, Secretary of State Hillary Clinton looks on as President Barack Obama delivers a statement on the death of U.S. ambassador to Libya
FILE - In this Wednesday, Sept. 12, 2012 file photo, Secretary of State Hillary Clinton looks on as President Barack Obama delivers a statement on the death of U.S. ambassador to Libya Christopher Stevens in the Rose Garden of the White House in Washington. Witness accounts gathered by The Associated Press give a from-the-ground perspective for the sharply partisan debate in the U.S. over the deadly incident. They corroborate the conclusion largely reached by American officials that it was a planned militant assault. But they also suggest the militants may have used a film controversy as a cover for the attack. (AP Photo/Evan Vucci)