A chemical, biological, radiological and nuclear team, assigned to the 28th Civil Engineer Squadron, and the bioenvironmental engineering flight, assigned to the 28th Medical Group, conduct chemical agent tests during a training scenario for exercise Ready Eagle on Ellsworth Air Force Base, S.D., May 14, 2021. The teams were called upon after simulated victims involved in the mass casualty exercise showed signs of possible chemical exposure. (U.S. Air Force photo by Airman 1st Class Jonah Fronk)