170721-N-RZ514-070 MEDITERRANEAN SEA (July 21, 2017) Aviation Structural Mechanic Airman Silas Gumbiner stacks boxes on an elevator in the hangar bay during a replenishment-at-sea (RAS) aboard the aircraft carrier USS George H.W. Bush (CVN 77). The ship and its carrier strike group are 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 Seaman Jennifer M. Kirkman/Released)