Airmen from the 51st Civil Engineer Squadron take off their Mission Oriented Protective Posture boots while going through a mock-decontamination line at Osan Air Base, Republic of Korea, May 11, 2016. The 51st CES held a training event during Exercise Beverly Herd 16-01 to give CES Airmen a chance to practice wartime survival skills. (U.S. Air Force photo by Senior Airman Victor J. Caputo/Released)