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)

U.S. Air Force Airman 1st Class Luke Calip, an emergency management specialist, and Staff. Sgt. Brian Tripp, an Emergency Management noncommissioned officer, both with the 633rd Civil Engineer Squadron Emergency Management flight, prepare to exit a simulated contaminated area at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. Calip and Tripp worked together to test an unknown substance to determine if it was a Chemical, Biological, Radiological or Nuclear agent. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

U.S. Air Force Airman 1st Class Luke Calip, an emergency management specialist with the 633rd Civil Engineer Squadron Emergency Management flight, tests the simulated contaminated substance at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The Fort Eustis Fire Department and the 633rd Civil Engineer Squadron Emergency Management flight participated in a Chemical, Biological, Radiological and Nuclear exercise to enhance their skills to work together as a team. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

Participants in the Chemical, Biological, Radiological and Nuclear exercise prepare to test an unknown substance in a simulated contaminated environment at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The equipment is used to test the unknown substance to see which category it belongs to under CBRN. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

U.S. Air Force Airman 1st Class Luke Calip, an emergency management specialist with the 633rd Civil Engineer Squadron Emergency Management flight, dons his protective equipment prior to going into a simulated contaminated area at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. Calip was participating in a joint Chemical, Biological, Radiological and Nuclear exercise with the Fort Eustis Fire department. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

Members from the Fort Eustis Fire Department and the 633rd Civil Engineer Squadron Emergency Management flight receive a briefing prior to entering a simulated contaminated area during a Chemical, Biological, Radiological and Nuclear exercise at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The exercise included donning protective gear, identifying an unknown substance, going through a denomination station and more. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

Firefighters with the Fort Eustis Fire Department set up a decontamination station at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The decontamination station was used during the Chemical, Biological, Radiological and Nuclear exercise to hose off those who entered into the simulated contaminated area. (U.S. Air Force photo by Senior Airman Delaney Gonzales)

Michael A. Evans, Fort Eustis Fire Department firefighter, prepares a fire truck for a Chemical, Biological, Radiological and Nuclear exercise at Joint Base Langley-Eustis, Virginia, Oct. 10, 2019. The exercise was a joint operation 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)