Air Force Reservists from the 940th Air Refueling Wing practice going through a transition control point in a simulated chemical warfare environment June 8, 2008 at Beale Air Force Base, Calif. Reservists are required to maintain the same level of combat readiness as their active duty counterparts. (U.S. Air Force Photo/ Staff Sgt. Luke Johnson)

Air Force Reservist Senior Airman Katie Lee, an emergency management instructor, with the 940th Civil Engineer Squadron trains Reservists from the 940th Air Refueling Wing on proper decontamination techniques at a transition control point June 8, 2008 at Beale Air Force Base, Calif. Reservists are required to maintain the same level of combat readiness as their active duty counterparts. (U.S. Air Force Photo/ Staff Sgt. Luke Johnson)