U.S. Air Force Staff Sgt. Chauncey Oliver, 8th Security Forces Squadron member, sweeps an area after an engagement with simulated hostile forces during routine training at Kunsan Air Base, Republic of Korea, Jan. 14, 2019. The 8th SFS frequently practices combat skills and tactics to ensure rapid response to contingencies. (U.S. Air Force photo by Staff Sgt. Levi Rowse/Released)