180915-F-PB060-1001
Tech. Sgt. Brian Nasuta, an aerial transportation specialist with the 58th Aerial Port Squadron, smiles after removing his M-50 gas mask after completing a chemical, biological, radiological and nuclear response training September 15, 2018 at Westover Air Reserve Base, Massachusetts. During this training, Airmen practiced donning and doffing Mission Oriented Protective Posture gear and procedures. (U.S. Air Force photo by Senior Airman Hanna Smith)