190401-N-PQ548-0069 ATLANTIC OCEAN (April 1, 2019) Aviation Ordnanceman 2nd Class Andre Castleberry fires an M2HB .50-caliber machine gun during a general quarters drill on the fantail aboard the Nimitz-class aircraft carrier USS Harry S. Truman (CVN 75). Harry S. Truman is currently underway conducting a sustainment exercise with Carrier Strike Group (CSG) 8 ships and squadrons to maintain qualifications and a deployment-ready status. (U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Isaac Champlain/Released)