171114-N-FP878-229 MEDITERRANEAN SEA (Nov. 14, 2017) Logistics Specialist 2nd Class Jordan Carter changes the barrel of a .50 caliber machine gun during a crew-served weapons shoot aboard the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75). Donald Cook, forward-deployed to Rota, Spain, is on its sixth patrol in the U.S. 6th Fleet area of operations in support of regional allies and partners, and U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 1st Class Theron J. Godbold/Released)