U.S. Air Force Tech. Sgt. Matthew Young and Senior Airman Luimar Rios, 56th Logistics Readiness Squadron cryogenics personnel, service a liquid nitrogen cart, May 24, 2023, at Luke AFB, Arizona. The cryogenics unit manufactures liquid oxygen and liquid nitrogen to provide oxygen at high altitudes for aircraft during training sorties. (U.S. Air Force video by Airman 1st Class Katelynn Jackson)