Libyans (foreground) pass by a demonstration by Ansar al-Shariah and other Islamic militias (background) as they march against the militias in Benghazi, Libya, on Friday, Sept. 21, 2012. Hundreds of protesters stormed the compound of one of Libya's strongest armed Islamic extremist groups, evicting militiamen and setting fire to their building as the attack that killed the U.S. ambassador and three other Americans sparked a public backlash against armed groups that run rampant in the country and defy the country's new, post-Moammar Gadhafi leadership. (AP Photo/Mohammad Hannon)

Photo by: Mohammad Hannon

Libyans (foreground) pass by a demonstration by Ansar al-Shariah and other Islamic militias (background) as they march against the militias in Benghazi, Libya, on Friday, Sept. 21, 2012. Hundreds of protesters stormed the compound of one of Libya's strongest armed Islamic extremist groups, evicting militiamen and setting fire to their building as the attack that killed the U.S. ambassador and three other Americans sparked a public backlash against armed groups that run rampant in the country and defy the country's new, post-Moammar Gadhafi leadership. (AP Photo/Mohammad Hannon)