160529-N-FQ994-127 MEDITERRANEAN SEA (May 29, 2016) Sailors shoot M-16 rifles aboard USS Porter (DDG 78) during low-light gun qualifications. Porter, an Arleigh Burke-class guided-missile destroyer, forward-deployed to Rota, Spain, is conducting a routine patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy Photo by Mass Communication Specialist 3rd Class Robert S. Price/Released)