Flying ‘high’: Aircrew members undergo altitude chamber training
U.S. Air Force Senior Airman Mason Wyman, 633rd Aerospace Medical Squadron aerospace physiology technician, reads gauges during altitude chamber training session at Langley Air Force Base, Va., June 25, 2014. Personnel turn off all lights in the altitude chamber to simulate night-time operations at high altitudes. (U.S. Air Force photo by Senior Airman Austin Harvill/Released)