U.S. Embassy protest in Cairo

Protesters destroy an American flag pulled down from the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

Protesters chant slogans amid orange smoke outside the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

Egyptian protesters wearing Guy Fawkes masks pose in front of graffiti on a wall of the U.S. Embassy during a protest in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

Protesters destroy an American flag pulled down from the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

Egyptian protesters chant anti-U.S. slogans in front of U.S. Embassy in Cairo Tuesdat — AP Photo

Egyptian protesters chant anti-U.S. slogans in front of the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

An Egyptian protester holds a sign that reads in Arabic "I sacrifice my soul for God's prophet" during a demonstration outside the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

Egyptians protest outside U.S. Embassy in Cairo Tuesday — AFP/Getty Images

Egyptians protest outside the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag

An Egyptian protester waves a black flag inscribed with the Muslim profession of faith "There is no God but God and Mohammed is the prophet of God" as he stands above the door of the U.S. Embassy in Cairo Sept. 11, 2012.

Egypt protesters scale U.S. Embassy wall, take flag