U.S. Air Force Tech. Sgt. Eric Hood, 51st Medical Operations Squadron medical decontamination instructor, demonstrates the proper way to use a sponge when decontaminating a patient on a litter on Osan Air Base, Republic of Korea, Aug. 18, 2015. The entire 51st Medical Group participated in multiple stages of readiness training to ensure the hospital and its patients would be safe from intruders and contaminants. (U.S. Air Force photo by Tech. Sgt. Travis Edwards/Released)