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JOINT BASE BALAD, Iraq -- Airman 1st Class Jacob John, 332nd Expeditionary Civil Engineer Squadron readiness and emergency management flight, sets up a hazardous material ID machine that is used to identify unknown substances during investigations, for possible chemical, biological, radiological, nuclear and environmental threats. John is a Baton Rouge, La., native deployed from Eglin Air Force Base, Fla. (U.S. Air Force photo/Tech. Sgt. Erik Gudmundson)
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