Chill with Cryogenics
Senior Airman Thomas Garcia, 96th Logistics Readiness Squadron, breaks off the ice crystals that formed around a liquid nitrogen transfer hose at Eglin Air Force Base, Fla. Liquid nitrogen, widely used as a coolant and freezing agent, is used by medical units, fire department, civil engineers, and in weapons testing across the base. (U.S. Air Force photo/Samuel King Jr.)