Airmen from the 628th Medical Group, erect a decontamination tent during a mass casualty exercise Oct. 3, 2012, at Joint Base Charleston - Air Base, S.C. During the exercise, the 628th MDG set up a cordon, secured the contaminated area and provided emergency medical treatment to simulated casualties. The training prepares Airmen to respond to a chemical, biological, radiological or nuclear catastrophe.