U.S. Air Force Airman 1st Class Zachary Day, 633rd Civil Engineer Squadron emergency manager, and Senior Airman Felicia Still, 633rd Aerospace Medical Squadron bioenvironmental engineering technician, test for explosive-borne contamination during a hazardous material exercise at Langley Air Force Base, Va., Dec. 18, 2013. The exercise examined how emergency management and bioenvironmental engineering personnel work together during a hazmat crisis. (U.S. Air Force photo by Senior Airman Brittany Paerschke-O'Brien/Released)
Brittany Paerschke-O'Brien
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