.S. Air Force Cap. “Champ”, 94th Fighter Squadron F-22 Raptor pilot, trains on the Reduced Oxygen Breathing Device at Joint Base Langley-Eustis, Virginia, June 13, 2019. The ROBD provides pilots the ability to get same day hypoxia training and still be able to fly a mission later in the day. (U.S. Air Force photo by Senior Airman Tristan Biese)