ELLSWORTH AIR FORCE BASE, S.D. -- (Right) Airman Basic Clarence Jones and Staff Sgt. Joseph Vawter, 28th Security Forces Squadron patrolmen, put on Mission Oriented Protective Posture gear during an alarm red of a Phase II Operational Readiness Exercise, March 3. 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)