Republic of Singapore Air Force Military Expert One Staff Sgt. Concenciao Axel, 425th Fighter Squadron maintainer, performs maintenance on an F-16C Fighting Falcon, Aug. 5, 2020, at Luke Air Force Base, Ariz. RSAF personnel have been training at Luke AFB since 1992 with the mission of providing advanced weapons and tactics continuation training for their F-16 pilots and maintainers. The RSAF is among six foreign national partners that train at Luke AFB, which directly contributes to the mission of training the world’s greatest fighter pilots and combat-ready Airmen. (U.S. Air Force photo by Senior Airman Leala Marquez)