Lt. Col. John A. Camacho-Ayala, 2nd Medical Group health care integrator and director of medical management, teaches a class on Tactical Combat Casualty Care at Barksdale Air Force Base, La., Dec. 7, 2020. TCCC is the new standard of care across the Department of Defense. (U.S. Air Force photo by Airman 1st Class Jacob B. Wrightsman)