Students of a Tactical Combat Casualty Care class provide breaths to a simulated critically injured patient using a bag valve mask and prepare to perform needle decompression during the “care under fire” portion of the class, May 13, 2020 at Andersen Air Force Base, Guam. TCCC is a two-day course that covers field medical training techniques that the students need to save a wingman’s life in a combat scenario. (U.S. Air Force photo by Senior Airman Zachary Heal)