362nd Training Squadron
Airmen Trey Clolinger, Sidney Rozas, Jeremy Harris and Zachary Guinn, 362nd Training Squadron students at Sheppard Air Force Base, Texas, service the oxygen on a C-130 Hercules Jan. 23, 2018 that is used by pilots and crew during flight. Clolinger, Rozas, Harris and Guinn are in block nine of 10 of the C-130 crew chief apprentice course and scheduled to graduate Feb. 5. (U.S. Air Force photo by Alan R. Quevy)