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Bradley Cooper, as US Navy Seal sniper Chris Kyle, in a scene from the new Warner Brothers movie American Sniper based on the book American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History, positioned on a rooftop lines up a shot to take out an insurgent sniper named Mustafa (Credit: Warner Brothers Pictures)

Bradley Cooper, as US Navy Seal sniper Chris Kyle, in a scene from the new Warner Brothers movie American Sniper based on the book American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History, positioned on a rooftop lines up a shot to take out an insurgent sniper named Mustafa (Credit: Warner Brothers Pictures)