Anti-Islam film causes deadly riots in Pakistan - Article Photos 20/20

A Pakistani police officer throws stone as others prepare to fire tear gas at protesters during clashes that erupted as protestors tried to approach the U.S. embassy, Friday, Sept. 21, 2012 in Islamabad, Pakistan. Protests by tens of thousands of Pakistanis infuriated by an anti-Islam film descended into deadly violence on Friday, with police firing tear gas and live ammunition in an attempt to subdue rioters who hurled rocks and set fire to buildings in some cities. Four people were killed and dozens injured on a holiday declared by Pakistan's government so people could rally against the video. AP photo