U.S. Air Force Staff Sgt. Rafael Ibarra, a medic assigned

U.S. Air Force Staff Sgt. Rafael Ibarra, a medic assigned to the 673d Medical Group, demonstrates how to properly apply a tourniquet on a simulated casualty while instructing tactical combat casualty care during a readiness and training exercise, Polar Force 20-1, at Joint Base Elmendorf-Richardson, Alaska, Oct. 7, 2019. Designed to test JBER’s mission readiness, Polar Force is a two-week exercise that developed the skills required to face and overcome adverse scenarios. (U.S. Air Force photo by Alejandro Peña)