130710-N-PM781-006 ATLANTIC OCEAN (July 10, 2013) An X-47B Unmanned Combat Air System (UCAS) demonstrator completes an arrested landing on the flight deck of the aircraft carrier USS George H.W. Bush (CVN 77). The landing marks the first time any unmanned aircraft has completed an arrested landing at sea. George H.W. Bush is conducting training operations in the Atlantic Ocean. (U.S. Navy photo by Mass Communication Specialist 1st Class Arif Patani/Released)