U.S. Air Force Capt. Travis Grindstaff, 79th Fighter Squadron flight surgeon, poses by an F-16 Viper at Shaw Air Force Base, South Carolina, Sept. 9, 2021. Grindstaff has been selected to join the U.S. Air Force Air Demonstration Squadron, the Thunderbirds, stationed at Nellis Air Force Base, Nevada. (U.S. Air Force photo by Senior Airman Cody Sanders)