U.S. Navy Hospital Corpsman 1st Class Francisco Abano inventories medical equipment aboard the aircraft carrier USS George H.W. Bush (CVN 77) Nov. 1, 2012, in Portsmouth, Va. George H.W. Bush was undergoing a planned incremental availability at Norfolk Naval Shipyard to refurbish shipboard systems and conduct maintenance. (U.S. Navy photo by Mass Communication Specialist 3rd Class K. Ashley Lawrence/Released)