Liquid nitrogen vapor escapes after a fuel transfer Dec. 7 at Eglin Air Force Base, Florida. The Airmen in charge of Eglin’s cryogenic storage saw a 1,400 % increase in their intake and output of liquid nitrogen over a three-month period due to a climatic munitions test. The team issued 19,000 gallons compared to an average of 2,100 cryogenic fuels during that window. (U.S. Air Force photo/Samuel King Jr.)