U.S. sailors aboard the guided missile destroyer USS Arleigh Burke (DDG 51) refuel an MH-60S Seahawk helicopter assigned to Helicopter Sea Combat Squadron (HSC) 9 in the Atlantic Ocean Dec. 6, 2013. The Arleigh Burke was part of the George H.W. Bush Carrier Strike Group and was underway participating in a composite training unit exercise in preparation for a scheduled deployment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jeff Atherton/Released)