160430-N-FQ994-645 MEDITERRANEAN SEA (April 30, 2016) USS Porter (DDG 78) Command Master Chief Allen Keller practices M-240 lightweight machine gun shooting skills aboard the ship April 30, 2016. 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)