GPS TRAINING A survival, evasion, resistance and escape specialist demonstrates how to use a Global Positioning System to U.S. Air Force airmen during a Survival, Evasion, Resistance and Escape refresher training course on Holloman Air Force Base, N.M., May 5, 2010. The airmen are assigned to the 7th Fighter Squadron. Pilots and aircrew members are required to demonstrate competency in SERE techniques. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 003403-Y-RHV54-724.jpg Photo Gallery