U.S. Air Force Survival, Evasion, Resistance and Escape specialists execute drills during a week-long Spontaneous Protection Enabling Accelerated Response System course at Davis-Monthan Air Force Base, Ariz., April 28, 2017. Tony Blauer, founder of Blauer Tactical Systems Inc., and SPEAR coach, instructed SERE specialists and other Guardian Angel counterparts in order to qualify them to teach the SPEAR System to personnel across the Air Force. (U.S. Air Force photo by Senior Airman Chris Drzazgowski)