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Newburgh, New York - Revolutionary War reenactors in uniforms prepare to fire a cannon at Washington's Headquarters State Historic Site as part of George Washington's birthday celebration on Feb. 18, 2012. The reenactors are from John Lamb's Artillery Company. Their cannon is modeled on the British three-pounder field piece. Hasbrouck House, the longest-serving headquarters of Washington during the American Revolution, is in the background.