Cryogenics keeps it cool
Yoshio Uwano, 35th Logistics Readiness Squadron cryogenics technician, inspects valves on a liquid nitrogen tank Dec. 1, 2010, at Misawa Air Base, Japan. The cryogenics lab is responsible for maintaining liquid oxygen and nitrogen which is used in Misawa aircraft. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer/Released)