OFFUTT AIR FORCE BASE, Neb. -- Senior Airman Nicholas Simon, a fuels facilities technician with the 55th Maintenance Squadron's Fuels Management Flight, purges a hose attached to a liquid oxygen tank in order to remove impurities prior to filling a portable oxygen cart, March 2. Airmen of the flight are responsible for the bulk storage and distribution of liquid oxygen, or LOX. (U.S. Air Force photo/Josh Plueger)

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Photo by: Josh Plueger |  VIRIN: 100302-F-7797P-001.JPG