An X-47B Unmanned Combat Air System (UCAS) taxies and launches from the flight deck of the aircraft carrier USS George H.W. Bush (CVN 77). George H.W. Bush is the first aircraft carrier to successfully catapult launch an unmanned aircraft from its flight deck.
Be sure to check out ECN's Engineering Update on this development here: http://www.ecnmag.com/videos/2013/05/engineering-update-11-navy-launches-drone-aircraft-carrier