Airman Andrew Grooters, from Grand Rapids, Mich., uses a brush to clean debris from components of a .50-caliber machine gun aboard the nuclear-powered aircraft carrier USS George Washington. George Washington departed its forward operating base of Commander, Fleet Activities Yokosuka on June 12, 2011, for a patrol to the western Pacific Ocean. (U.S. Navy photo by Seaman Apprentice Erin Devenberg)