Cryogenics provide the coolest, freshest air
U.S. Air Force Airman Wesley Henderson, a fuels distribution technician with the 35th Logistics Readiness Squadron, oversees a liquid oxygen tank refilling at Misawa Air Base, Japan, June 29, 2016. In order to work around the minus 230 degrees Fahrenheit liquid oxygen, Airmen must wear a face shield, helmet, gloves, rubber apron and long sleeves. Henderson is from Topsham, Maine. (U.S. Air Force photo by Senior Airman Deana Heitzman)