Unmanned Combat Air System Demonstrator

An X-47B Unmanned Combat Air System Demonstrator (UCAS-D) completes its first flight at Edwards Air Force Base, Calif., Feb. 4, 2011. The UCAS-D program will demonstrate the capability of an autonomous, low-observable unmanned aircraft to perform carrier launches and recoveries. (DoD photo courtesy of Northrop Grumman/Released)