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Gunner's Mate Seaman Brady Kamper, from Waterford, Pa., attaches a barrel to a .50-caliber machine gun aboard the Arleigh Burke-class guided-missile destroyer USS Curtis Wilbur (DDG 54). Curtis Wilbur is assigned to Destroyer Squadron (DESRON) 15, the Navy's largest forward-deployed DESRON and the U.S. 7th Fleet's principal surface force.