180705-N-KP948-0280 MEDITERRANEAN SEA (July 5, 2018) Senior Chief Hospital Corpsman Christian Kerlick, right, trains Sailors on first-aid aboard the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75) during a general quarters drill. Donald Cook is forward-deployed to Rota, Spain, on its seventh 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 and Africa. (U.S. Navy photo by Mass Communication Specialist 2nd Class Alyssa Weeks/Released)