Airmen from Osan Air Base swim during a Survival, Evasion, Resistance and Escape water survival refresher course at U.S. Army Garrison Camp Humphreys, Republic of Korea, Dec. 17, 2020. SERE Augmentees play an integral part during the WST by readying and preparing the equipment, performing simulated rescues and parachute drags, and by helping pilots and weapon systems officers get the most out of the training. (U.S. Air Force photo by Senior Airman Branden Rae)