U.S. Air Force Capt. Erik DeSoucy, 563rd Operations Support Squadron flight physician, applies fake blood to the pants of Braden Vincent, University of Arizona Air Force Reserve Officers' Training Corps. cadet, to aid in the realism of Vincent’s simulated injury during the Angel Thunder exercise at Davis-Monthan Air Force Base, Ariz., Oct. 11. Approximately 1,400 U.S. Military, federal and state employees, and coalition forces are participating in the fifth-annual Angel Thunder exercise, the largest military combat search and rescue exercise in the world. (U.S. Air Force photo/Airman 1st Class Timothy D. Moore/Released)