Staff Sgt. Luz Soto, a 482nd Logistics Readiness Squadron cryogenics operator, obtains a liquid oxygen quality test sample, Homestead Air Reserve Base, Fla., Oct. 27, 2016. Liquid oxygen is utilized by pilots and aircrews at altitudes upwards of 10,000 feet. (U.S. Air Force photo by Staff Sgt. Desiree W. Moye)