Airmen of the 28th Civil Engineer Squadron

Airmen 1st Class David Jack (right) and Matthew Hung participate in an emergency management exercise, June 3, 2010, at Ellsworth Air Force Base, S.D. Both Airmen are 28th Civil Engineer Squadron emergency management journeymen, and perform chemical, biological, radiological and nuclear detection and decontamination operations. (U.S. Air Force photo/Airman 1st Class Corey Hook)