150903-N-SX983-352 ATLANTIC OCEAN (Sept. 3, 2015) The Arleigh Burke-class guided-missile destroyer USS Gravely (DDG 107) fires the ship's 5-inch gun during a live fire exercise. Gravely is underway participating in a Composite Training Unit Exercise (COMPTUEX) with the Harry S. Truman Carrier Strike Group. (U.S. Navy photo by Mass Communication Specialist Seaman L. E. Skelton/Released)