OSAN AIR BASE - Senior Airman Thomas Yeung, 36th Fighter Generation Squadron crew chief, documents his post-flight maintenance during a training sortie at Gwangju Air Base, Republic of Korea, Aug. 18, 2022. Deployed to Gwangju for the week, Yeung and other Airmen trained and performed different jobs to become multi-capable Airmen as part of the U.S Air Force’s Agile Combat Employment concept.