The Northrop Grumman X-47B is a demonstration Unmanned Combat Aerial Vehicle. The X-47 began as part of DARPA’s J-UCAS program, and is now part of the United States Navy’s UCAS-D (Unmanned Combat Air System Demonstration) program to create a carrier-based unmanned aircraft. With a range over 3000 Km and none on board is expected to finish its sea trials at  2013. We want to thank to Luis Santiesteban  for his videos and news in these topics that so kindly send us from Northrop Grumman in California.