U.S. Air Force Staff Sgt. Kenneth Gleason, a 35th Aircraft Maintenance Squadron dedicated crew chief, conducts maintenance inspections on an F-16 Fighting Falcon during VIGILANT ACE 18 at Osan Air Base, Republic of Korea, Dec. 6, 2017. The 35th Fighter Wing relocated more than 280 personnel and 18 F-16 Fighting Falcons to further enhance the wing’s ‘fight tonight’ capability during the annual exercise held across the Korean Peninsula. (U.S. Air Force photo by Staff Sgt. Deana Heitzman)