High-Altitude Mask An Air Force pararescueman adjusts his high-altitude training mask before participating in a training jump over Francis S. Gabreski Air National Guard Base in Westhampton Beach, N.Y., Aug. 31, 2016. Air National Guard photo by Staff Sgt. Christopher S. Muncy SHARE: Download: Full Size (1.5 MB) Tags: Air Force, training, Airmen Credit: Staff Sergeant Christopher S. Muncy VIRIN: 160830-Z-SV144-024.JPG Photo Gallery