U.S. Air Force Airman 1st Class Robert Dodd, 5th Aircraft Maintenance Squadron crew chief, performs liquid oxygen maintenance at RAF Fairford, United Kingdom, June 3, 2024. Liquid oxygen, or LOX, is used to provide clean oxygen to pilots and anyone on an aircraft above 10,000 feet. (U.S. Air Force photo by Airman 1st Class Jared Brewer)