Tech. Sgt. Kenneth Petty of the 919th Operations Support Squadron, left, instructs Lt. Col. Chris Snider from the 711th Special Operations Squadron on the safe removal of his protective ensemble on the contamination control line after a recent chemical warfare defense scenario at Duke Field, Fla. Behind them, Tech. Sgt. Christiaan Becker, an exercise evaluation team member, observes. The simulation was one of several conducted during the 919th Special Operations Wing's Operational Readiness Exercise, which tested the reservists' ability to survive and operate after an enemy attack. (U.S. Air Force photo/Dan Neely)
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