U.S. Air Force Capt. Nicholas DeWulf, a 13th Fighter Squadron F-16 Fighting Falcon pilot, waits as Airman 1st Class Mnason Mikesell, a 35th Aircraft Maintenance Squadron crew chief, conducts preflight inspections during VIGILANT ACE 18 at Osan Air Base, Republic of Korea, Dec. 4, 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)