51st FSS Airmen discover UXO and practice TCCC Published Sept. 15, 2022 By Staff Sgt. Skyler Combs 51st Fighter Wing Public Affairs OSAN AIR BASE, Republic of Korea -- 51st Force Support Squadron Airmen discover simulated unexploded ordnance (UXO) and a simulated trauma victim during a post-attack reconnaissance sweep as part of a base-wide training event at Osan Air Base, Republic of Korea, Sept. 14, 2022.