Staff Sgt. Jeremy Parks, 92nd Civil Engineer Squadron emergency management craftsman, and Senior Airman Adam Wriglesworth, 92nd Civil Engineer Squadron readiness journeyman, use the MultiRae and TVA-1000 devices to detect hypothetical hazards in the scenario building at Fairchild Air Force Base, Wash., Aug. 1, 2013. The devices test for oxygen, carbon monoxide, hydrogen sulfide, lower explosive limits and volatile organic compounds for all chemicals. (U.S. Air Force photo by Airman 1st Class Sam Fogleman/Released)
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