** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (AP Photo/Ibrahim Alaguri)
** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (AP Photo/Ibrahim Alaguri)
** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (AP Photo/Ibrahim Alaguri)
** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (AP Photo/Ibrahim Alaguri)
** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (AP Photo/Ibrahim Alaguri)
** FILE ** In this Wednesday, Sept. 12, 2012 photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. The graffiti reads, "no God but God," " God is great," and "Muhammad is the Prophet." (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)
A burned car is seen on Wednesday, Sept. 12, 2012, after an attack the day before on the U.S. Consulate in Benghazi, Libya, by protesters angry over a film that ridicules Islam's Prophet Muhammad. The U.S. ambassador to Libya and three other Americans were killed. (AP Photo/Ibrahim Alaguri)
A burned car is seen on Wednesday, Sept. 12, 2012, after an attack the day before on the U.S. Consulate in Benghazi, Libya, by protesters angry over a film that ridicules Islam's Prophet Muhammad. The U.S. ambassador to Libya and three other Americans were killed. (AP Photo/Ibrahim Alaguri)
