Flight Formation Members of the Thunderbirds, the Air Force's flight demonstration squadron, fly in formation over Dover Air Force Base, Del., Aug. 26, 2017, during the Thunder Over Dover Open House. Air Force photo by Senior Airman Zachary Cacicia SHARE: Download: Full Size (1.78 MB) Credit: Senior Airman Zachary Cacicia VIRIN: 170826-F-BF612-0666C.JPG Photo Gallery