180804-N-LI768-1218 PACIFIC OCEAN (Aug. 4, 2018) The guided-missile destroyer USS Dewey (DDG 105) fires its Mark 45 5-inch gun during a live-fire exercise. Dewey is underway in the U.S. 3rd Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Devin M. Langer/Released)