U.S. Air Force Gen. Jacqueline Van Ovost, Air Mobility Command commander, second from the left, and Chief Master Sgt. Brian Kruzelnick, AMC command chief, right, try on a hood for an oxygen treatment inside the 60th Aerospace Medicine Squadron hyperbaric chamber at David Grant USAF Medical Center at Travis Air Force Base, California, Sept. 1, 2020. Van Ovost is currently the highest-ranking female in the military. (U.S. Air Force photo by Nicholas Pilch)