U.S. Air Force Senior Airman Tyler Bartlemus, 176th

U.S. Air Force Senior Airman Tyler Bartlemus, 176th Civil Engineer Squadron emergency manager, uses a chemical hazard detection simulator for exercise Polar Force at Joint Base Elmendorf-Richardson, Alaska, April 2, 2019. The tool responds to electronic sources that simulate chemical vapors, toxic substances or false positives. Polar Force is a two-week exercise designed to test JBER’s mission readiness, and develops the skills service members require to face adverse situations. (U.S. Air Force photo by Airman 1st Class Caitlin Russell)