USAF POTW 11 OCT 2019 PHOTO 13

Staff Sgt. Rafael Ibarra, 673rd Medical Group medic, performs a simulated casualty assessment while instructing tactical combat casualty care during exercise Polar Force 20-1, at Joint Base Elmendorf-Richardson, Alaska, Oct. 7, 2019. Designed to test mission readiness, Polar Force is a two-week exercise that develops the skills required to face and overcome adverse scenarios. (U.S. Air Force photo by Alejandro Peña)