St. Louis Skyline The Thunderbirds, the Air Force flight demonstration squadron, fly by the Gateway Arch in St. Louis, June 12, 2017, while returning to Nellis Air Force Base, Nev. Air Force photo by Tech. Sgt. Christopher Boitz SHARE: Download: Full Size (1 MB) Credit: Tech. Sgt. Christopher Boitz VIRIN: 170612-F-HA566-068C.JPG Photo Gallery