U.S. Air Force Airman 1st Class Jonah Schuline, 31st Aircraft Maintenance Squadron crew chief, services liquid oxygen (LOX) bottles for multiple F-16 Fighting Falcons at Aviano Air Base, Italy, Feb. 1, 2021. LOX is pressurized oxygen that is cooled to minus 297 degrees Fahrenheit, turning it into a boiling liquid. Ramirez wore a face shield, coveralls, gloves, and boots to protect his skin from contact burns. (U.S. Air Force photo by Senior Airman Ericka A. Woolever)