Keywords: X-47B receives fuel from an Omega K-707 tanker while operating in the Atlantic Test Ranges.jpg en The U S Navy's unmanned Northrop Grumman X-47B receives fuel from an Boeing 707-368C tanker while operating in the Atlantic Test Ranges over the Chesapeake Bay USA This test marked the first time an unmanned aircraft refueled in flight 2015-04-22 150422-N-CE233-457 Navy http //www navy mil/view_image asp id 195121 U S Navy photo PD-USGov-Military-Navy Northrop Grumman X-47B N707MQ aircraft Aerial refueling |