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)