160530-N-FQ994-039 MEDITERRANEAN SEA (May 30, 2016) USS Porter (DDG 78) test fires its Mk 45 lightweight 5-inch gun during a live fire exercise May 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)