A 564th Aircraft Maintenance Squadron worker assists with programmed depot maintenance on a KC-135 Stratotanker at the Oklahoma City Air Logistics Complex on Tinker Air Force Base, Oklahoma, Nov. 23, 2019. Once PDM is complete, Airmen from the aircraft’s home station tour the OC-ALC to discuss with the workers common defects they’re experiencing with the aircraft. (U.S. Air Force photo by Airman Kiaundra Miller)