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

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

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