U.S. Air Force aerospace physiology technicians with the 14th Operations Support Squadron help prepare pilots from the 37th Flying Training Squadron for hypobaric chamber training Dec.7, 2020, on Columbus Air Force Base, Miss. During hypobaric chamber training, pilots go through a series of test to simulate the effects of high altitude, such as low oxygen and low ambient air pressure. (U.S. Air Force photo by Airman 1st Class Jessica Williams)