ELLSWORTH AIR FORCE BASE, S.D. -- (Left to right) Staff Sgt. Joseph Vawter and Airman Basic Clarence Jones, 28th Security Forces Squadron patrolmen, don chemical and biological warfare personal protective equipment during a Phase II Operational Readiness Exercise, March 2. The Phase II ORE is designed to mimic a deployed environment and test the combat abilities of Ellsworth's Airmen. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)