180626-N-LI768-1202 PACIFIC OCEAN (June 26, 2018) A propellant casing from a Mark 45 5-inch gun rests on the deck of the guided-missile destroyer USS Dewey (DDG 105) following a live-fire exercise in the Pacific Ocean. (U.S. Navy photo by Mass Communication Specialist 2nd Class Devin M. Langer/Released)