ELLSWORTH AIR FORCE BASE, S.D. -- Airmen from the 28th Logistics Readiness Squadron provide Self-Aid Buddy Care to a simulated "victim" during a Phase II Operational Readiness Exercise while in Mission Oriented Protective Posture gear, March 2. MOPP 4 gear consists of chemical and biological warfare jacket and pants, protective rubber boots, rubber gloves, helmet and gas mask. (U.S. Air Force photo/Airman 1st Class Matthew Flynn)