LANGLEY AIR FORCE BASE, Va. -- Pilots from the 1st Operations Support Squadron perform an emergency evacuation from a raft, also know as a 20-man egress, during survival, evasion, resistance and escape water survival training here June 20. During the summer, the 1st OSS holds SERE training sessions twice a month for cadets entering pilot training. (U.S. Air Force photo/Senior Airman Tabitha Kuykendall)