An X-47B Unmanned Combat Air System Demonstrator completes its first flight at Edwards Air Force Base, California, in this US Navy handout photo dated Feb 4, 2011. The demonstration program will establish the capability of an autonomous, low-observable unmanned aircraft to perform aircraft carrier launches and recoveries.[Photo/Agencies]
An X-47B Unmanned Combat Air System Demonstrator completes its first flight at Edwards Air Force Base, California, in this US Navy handout photo dated Feb 4, 2011.[Photo/Agencies]