151203-N-AO823-023 MEDITERRANEAN SEA (Dec. 3, 2015) Sailors conduct a helicopter in-flight refueling from guided-missile destroyer USS Bulkeley (DDG 84). Bulkeley, part of the Harry S. Truman Carrier Strike Group, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 2nd Class M. J. Lieberknecht/Released)