362nd Training Squadron fighter crew chief apprentice course
Staff Sgt. Adam Armstrong (left), a 362nd Training Squadron crew chief apprentice course instructor, demonstrates how to remove and install the power take off shaft on a F-16 Fighting Falcon at Sheppard Air Force Base, Texas, on July 28, 2020. The power takeoff shaft provides auxiliary power on the F-16 during flight. Armstrong’s class is in block nine of nine in the apprentice course and scheduled to graduate Aug. 3, 2020. (U.S. Air Force photo by Alan R. Quevy)