Royal Australian Air Force Flight Lt. Michelle Polgar, RAAF medic, applied a wound-dressing to a hemorrhage simulation training mannequin during the Tactical Combat Casualty Care course at Fairchild Air Force Base, Washington, Sept. 12, 2019. TCCC is designed to help lessen preventable combat deaths by providing proven trauma stabilization techniques, allowing for wounded to survive long enough to receive life-saving treatment. (U.S. Air Force photo by Senior Airman Ryan Lackey)