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Fire Controlman 2nd Class Samuel Thomas, from Carol Stream, Ill., ‘racks’ an M2HB .50-caliber machine gun on the foc’s’le during a small craft attack team (SCAT) drill aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56). McCain is assigned to Destroyer Squadron Fifteen (DESRON 15), the Navy’s largest forward-deployed DESRON and the U.S. 7th Fleet’s principal surface force.