Airmen from 31st AMXS service LOX during NATO eAP
U.S. Air Force Staff Sgt. Josue Ramirez, 31st Aircraft Maintenance Squadron dedicated crew chief, services the liquid oxygen bottle of an F-16 Fighting Falcon during NATO enhanced Air Policing at Graf Ignatievo Air Base, Bulgaria, Oct. 20, 2020. LOX is pressurized oxygen that is cooled to minus 297-degrees Fahrenheit, turning it into a boiling liquid. Ramirez wore face shields, coveralls, gloves, and boots to protect his skin from contact burns. (U.S. Air Force photo by Airman 1st Class Ericka A. Woolever)