150401-N-JN664-192 ATLANTIC OCEAN (April 1, 2015) Gunner’s Mate Seaman Samantha Canchola, from Chicago, and Gunner’s Mate Kamal Carson, from Jacksonville, Fla., perform post-fire maintenance to a MK 45 5-inch gun aboard USS Donald Cook (DDG 75) during flag officer sea training (FOST), April 1, 2015. Donald Cook, an Arleigh Burke-class guided-missile destroyer forward-deployed to Rota, Spain, is conducting naval operations 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 Karolina A. Oseguera/Released)