4th CES Airmen transition from peacetime readiness into wartime posture
U.S. Air Force Staff Sgt. Skipper Valentin-Cruzado attempts to remove his gas mask during ability to survive and operate training in a chemical, biological, radiological and nuclear environment on Seymour Johnson Air Force Base, N.C., May 15, 2012. Military members must practice proper reactions to fluctuating force protection conditions and mission oriented protective posture levels to prepare for real-world CBRN attacks. Valentin-Cruzado, 4th Civil Engineer Squadron logistics NCO in charge, hails from Mayaguez, Puerto Rico. (U.S. Air Force photo/Airman 1st Class Aubrey Robinson/Released)