ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Ashton Horsting, 28th Medical Operations Squadron medical technician, secures the mock patient’s litter to a stand while Tech. Sgt. Jackson Clark, 28th MDOS medical technician, steadies the litter during a Phase II operational readiness exercise, Oct. 6. A Phase II exercise is designed to prepare Airmen for deployed operations, including chemical warfare attacks. (U.S. Air Force photo/Senior Airman Kasey Zickmund)