A launch crew prepares a Northrop Grumman X-47B Unmanned Combat Air System (UCAS) demonstrator for its first land-based catapult launch in this US Navy handout photo taken at Patuxent River, Maryland Nov 29, 2012. The Navy's first-ever steam catapult launch of the pilotless X-47B ensures the vehicle can structurally handle the rigors of the aircraft-carrier environment. [Photo/Agencies] |