An X-47B Unmanned Combat Air System (UCAS) demonstrator launches from the flight deck of the aircraft carrier USS George H.W. Bush in this US Navy handout photo taken off the coast of Virginia May 14, 2013. The US Navy made aviation history on Tuesday by catapulting an unmanned jet off an aircraft carrier for the first time, testing a long-range, stealthy, bat-winged plane that represents a jump forward in drone technology. [Photo/Agencies/China Daily]