U.S. Air Force Tech. Sgt. Ryan Hyslop, right, Air Force Global Strike Command Det. 4 survival, evasion, resistance and escape specialist, shows Airmen how to build shelter using natural resources, July 27, 2017, at Andersen Air Force Base, Guam. The SERE course provided jungle specific survival techniques to individuals at risk of being isolated in a jungle environment. (U.S. Air Force photo by Airman 1st Class Christopher Quail)