170815-N-FP878-931 ATLANTIC OCEAN (Aug. 15, 2017) Yeoman 3rd Class Luis Riveracolon fires a .50-caliber machine gun during a weapons course aboard the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75). Donald Cook is forward-deployed to Rota, Spain, conducting a patrol in the U.S. 6th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 1st Class Theron J. Godbold/Released)