In this image provided by the U.S. Navy, Dave Lorenz, a Northrop Grumman deck operator, drives an X-47B Unmanned Combat Air System demonstrator using an arm-mounted controller on the flight deck of the aircraft carrier USS George H.W. Bush Friday May 10, 2013. The George H.W. Bush is scheduled to be the first aircraft carrier to catapult launch an unmanned aircraft from its flight deck Tuesday May 14, 2013. (AP Photo/US Navy, Specialist 2nd Class Timothy Walter)
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