Into thin air: liquid oxygen keeps pilots flying
Senior Airman Laenya Maze, 36th Maintenance Squadron electrical and environmental technician, releases built up pressure from a liquid oxygen cart Dec. 1, 2015, at Andersen Air Force Base, Guam. Before a cart is transported to a jet, all built up pressure is released and the cart must pass inspection. (U.S. Air Force photo/Senior Airman Cierra Presentado/)

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