372nd TRS Det. 21: Training future U-2 crew chiefs
Airman Tristin Boyvin, 372nd Training Squadron Detachment 21 crew chief student, grounds a U-2 Dragon Lady Aug. 8, 2019, at Beale Air Force Base, California. Det. 21 is responsible for training new Airman coming from technical school on how to work on the U-2. (U.S. Air Force photo by Senior Airman Tristan D. Viglianco)