160405-N-CL027-021 ATLANTIC OCEAN (April 5, 2016) The guided-missile destroyer USS Mason (DDG 87) fires a MK 45 5-inch gun during a Naval Surface Fire Support (NSFS) Exercise. Mason is underway conducting a Composite Training Unit Exercise (COMPTUEX) with the Dwight D. Eisenhower Carrier Strike Group in preparation for a future deployment (U.S. Navy photo by Seaman Janweb B. Lagazo/Released)