A firefighter with the Fort Eustis Fire Department sprays water on a simulated contaminated firefighter during a Chemical, Biological, Radiological and Nuclear exercise at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The exercise was a joint effort between the Fort Eustis Fire Department and the 633rd Civil Engineer Squadron Emergency Management flight. (U.S. Air Force photo by Senior Airman Delaney Gonzales)