U.S. Air Force Staff Sgt. Brock Pustejovsky, a 28th Security Forces Squadron base defense operations center controller, dons Mission-Oriented Protective Posture 4 (MOPP 4) gear after a simulated Chemical, Biological, Radiological, Nuclear and Explosive (CBRNE) attack by enemy forces during a Cerberus Defender exercise at Ellsworth Air Force Base, S.D., 18 July, 2024. CBRNE techniques was incorporated into the exercise as part of routine training Airmen undergo to remain deployment-ready. (U.S. Air Force photo by Senior Airman Josephine Pepin)