article_snippet.sent: Flying gas stations that can refuel robotic military aircraft have come a step closer.
article_snippet.sent: The first ever mid-air refuelling of an unmanned aircraft was today successfully achieved by Drone.
article_snippet.sent: The first ever mid-air refuelling of an unmanned aircraft is one of two Unmanned Carrier Air Vehicle demonstrators (UCAS-D) on the X-47B program.
article_snippet.sent: The first mid-air refuelling of an unmanned aircraft was today successfully achieved by the Navy.
article_snippet.sent: Refuelling in flight is the last hurdle for the Northrop Grumman-built jet, claims to Captain Beau Duarte, program manager of the Navy's Unmanned Carrier Aviation.
article_snippet.sent: Mid-air refuelling is difficult enough for human pilots, but the ability for drones to do it could eman drones only ever have to land for equipment updates.