U.S. Air Force Staff Sgt. Brenton Brown, 822nd Base Defense Squadron fireteam leader, prevents people from entering a cordoned area during a simulated explosives and hazardous material scenario, May 25, 2017, at Moody Air Force Base, Ga. The exercise simulated initial responses from first responders who then contacted other appropriate units after assessing the potential threat while also assisting the simulated victims of hazardous materials. (U.S. Air Force photo by Airman 1st Class Daniel Snider)