Staff Sgt. Shayne Denihan, 445th Security Forces Squadron, trains SFS Airmen on how to build a fire in an austere environment during the SERE training at the Oakes Quarry Park in Fairborn, Ohio May 6, 2017. This event was part of a three-day expeditionary training which consisted of several phases to include: Humvee mount/dismount, SERE, setting up/tear down tents, and night vision goggles. (U.S. Air Force photo /Tech. Sgt. Patrick O’Reilly)