Global Hawk UAV-to-UAV Refueling DemonstrationNASA Global Hawk No. 871 took off from Edwards Air Force Base in California during a checkout flight to prepare for an unmanned aerial refueling demonstration.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/global-hawk-uav-uav-refueling-demonstration-2/Copy URL to clipboard> DownloadShareSize1041x694px