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150915-N-GK939-023 ATLANTIC OCEAN (Sept. 15, 2015) Aviation Ordnanceman 1st Class A. Pins, left, and Aviation Ordnanceman Airman G. Nigro perform maintenance on an M-61 A1 20 mm gun in the aviation ordnance shop aboard the aircraft carrier USS Harry S. Truman (CVN 75). The Harry S. Truman Carrier Strike Group is underway participating in a composite training unit exercise (COMPTUEX) in preparation for a future deployment. (U.S. Navy photo by Mass Communication Specialist Seaman L. A. Preston/Released)
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