ATLANTIC OCEAN - MAY 14:  In this handout released by the U.S. Navy,  An X-47B Unmanned Combat Air System (UCAS) demonstrator is lifted on an aircraft elevator aboard the aircraft carrier USS George H.W. Bush (CVN 77) May 14, 2013 in the Atlantic Ocean. George H.W. Bush is scheduled to be the first aircraft carrier to catapult-launch an unmanned aircraft from its flight deck. The Navy plans to have unmanned aircraft on each of its carriers to be used for surveillance and be armed and used in combat roles.  (Photo by Mass Communication Specialist 2nd Class Timothy Walter/U.S. Navy via Getty Images)