Staff Sgt. Johanna Esquivel, left, 2nd Operational Medical Readiness Squadron medical technician, provides tactical field care to a training dummy during a Tactical Combat Casualty Care field training exercise at Barksdale Air Force Base, La., Dec. 9, 2020. TCCC is developed by the U.S. Department of Defense Defense Health Agency (DHA) Joint Trauma System to teach evidence-based, life-saving techniques and strategies for providing the best trauma care on the battlefield. (U.S. Air Force photo by Airman 1st Class Jacob B. Wrightsman)