Photo Gallery: Riots in Pakistan: Sept. 21, 2012 17/20

Police chase protesters during an anti-U.S. rally in Peshawar, Pakistan, Friday, Sept 21, 2012. Tens of thousands protested around the country against an anti-Muslim film after the government encouraged peaceful protests and declared a national holiday --? "Love for the Prophet Day." Demonstrations turned violent and over a dozen people were killed. AP photo