160616-N-TC720-253 MEDITERRANEAN SEA (June 16, 2016) USS Donald Cook (DDG 75) conducts live fire 5 inch gunnery exercises. Donald Cook, 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 2nd Class Mat Murch/Released)