Sailors from the Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75) perform a hot in-flight refueling with an MH-60S helicopter from the Dragon Whales of Helicopter Sea Combat Squadron (HSC) 28 during flight quarters. Donald Cook, homeported in Rota, Spain, is conducting naval operations in the U.S. 6th Fleet area of responsibility in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Karolina A. Oseguera/Released)