Dressed in chemical warfare protective clothing while participating in an operational readiness exercise, Staff Sgt. Greg Guebert, a 442nd Logistics Readiness Squadron fuels specialist, unwinds a refueling hose to be attached to an 442nd Fighter Wing A-10 Thunderbolt II as crew chief, Tech. Sgt. Pete Melby, 442nd Aircraft Maintenance Squadron, waits by the aircraft. The 442nd FW is an Air Force Reserve Command unit based at Whiteman Air Force Base, Mo. (US Air Force photo/Master Sgt. Bill Huntington)