151028-N-TC720-402 MEDITERRANEAN SEA (Oct. 28, 2015) USS Donald Cook (DDG 75) pulls away from the Military Sealift Command fleet replenishment oiler USNS Leroy Grumman (T-AO-195) after completing a replenishment at sea Oct. 28, 2015. 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 3rd Class Mat Murch/Released)