Surviving the altitude
Master Sgt. Virginia McDonough, 48th Aerospace Medical Squadron flight chief of operational physiology, assists a pilot from the 100th Operations Group during simulated hypoxia training at Royal Air Force Lakenheath, England, Sept. 17, 2014. Hypoxia is a condition in which the tissues of the body don’t receive enough oxygen, causing loss of consciousness. Hypoxia training helps pilots recognize the signs and symptoms of the condition and teaches them how to avoid it before encountering the adverse effects. (U.S. Air Force photo by Airman 1st Class Erin O’Shea/Released)