150325-N-JN664-069 PLYMOUTH, ENGLAND (March 25, 2015) USS Donald Cook (DDG 75) Sailors prepare the ship for departure from Plymouth, England, March 25, 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)