Afghans burn the U.S. flag in Herat, west of Kabul, Afghanistan, Sunday, Sept. 16, 2012, during a protest against an Internet video mocking the Prophet Muhammad that many fear could further aggravate Afghan-U.S. relations. The video has sparked protests throughout the Muslim world and the Afghan government blocked the YouTube site that hosts the video and its parent company, Google Inc., over the weekend in a move to prevent violent protests. (AP Photo/Hoshang Hashimi)
