Airborne Refueling The Thunderbirds, the Air Force's flight demonstration squadron, refuel via a KC-10 Extender en route to Washington, D.C., to conduct a flyover honoring front line COVID-19 first responders and essential workers, May 2, 2020. SHARE: Download: Full Size (7.23 MB) Tags: Air Force Credit: Air Force Tech. Sgt. Ned T. Johnston VIRIN: 200502-F-ID984-633B.JPG Photo Gallery