MCA Training
A U.S. Air Force Airman checks for massive hemorrhage, airway, respirations, circulation, head injury/hypothermia at Davis-Monthan Air Force Base, Arizona, Feb. 9, 2022. The application of MARCH, a mnemonic, is widely used by the U.S. military as the standard for how to determine serious injuries. (U.S. Air Force photo by Airman 1st Class Vaughn Weber)