191224-N-OK547-1002 PHILLIPINE SEA (Dec. 24, 2019) Gunner's Mate 2nd Class Michael Guirau, left, from Columbia, S.C., instructs, Seaman Apprentice Hunter Deverrick, from Paso Robles, Calif., on how to control the Mark-38 25 mm gun control system during live-fire drills aboard the Arleigh Burke-class guided-missile destroyer USS Barry (DDG 52). Barry is underway conducting operations in the Indo-Pacific region while assigned to Destroyer Squadron (DESRON) 15, the Navy's largest forward-deployed DESRON and the U.S. 7th Fleet's principal surface force. (U.S. Navy photo by Mass Communication Specialist 3rd Class Keia Randall/Released)