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)

U.S. Air Force Senior Airman Felicia Still, 633rd Aerospace Medical Squadron bioenvironmental engineering technician, dons her gas mask during a hazardous material exercise at Langley Air Force Base, Va., Dec. 18, 2013. The exercise aimed to enhance emergency response operations in the event of a real-world crisis. (U.S. Air Force photo by Senior Airman Brittany Paerschke-O’Brien/Released)

U.S. Air Force Airman 1st Class Zachary Day, 633rd Civil Engineer Squadron emergency manager, communicates via handheld radio during a hazardous material exercise at Langley Air Force Base, Va., Dec. 18, 2013. The scenarios allowed emergency management and law enforcement personnel to work together and improve crisis management skills. (U.S. Air Force photo by Senior Airman Brittany Paerschke-O’Brien/Released)

U.S. Air Force Staff Sgt. Jasmine Clemons, 633rd Aerospace Medicine Squadron bioenvironmental engineering technician, puts on her gas mask during a hazardous material exercise at Langley Air Force Base, Va., Dec. 18, 2013. The HAZMAT exercise tested the teams’ reaction and accuracy to a chemical emergency. Clemons hails from Los Angeles, Calif. (U.S. Air Force photo by Airman 1st Class Victoria H. Taylor/Released)

U.S. Air Force Airman 1st Class Zachary Day, 633rd Civil Engineer Squadron emergency manager, tests the simulated hazard zone at Langley Air Force Base, Va., Dec. 18, 2013. The 633rd CES paired up with the 633rd Aerospace Medicine Squadron bioenvironmental engineering team to practice real-world situations. Day hails from Owensboro, Ky. (U.S. Air Force photo by Airman 1st Class Victoria H. Taylor/Released)