Five A-10 Thunderbolt IIs from the 25th Fighter Squadron, Osan Air Base, Republic of Korea, taxi down the flightline during a routine training mission at Kunsan AB, ROK, April 15, 2021. The 25th FS was activated under the 51st Fighter Wing at Osan AB in October 1993. Fighter squadrons conduct routine training to sustain mission effectiveness. (U.S. Air Force photo by Staff Sgt. Mya M. Crosby)