As the shuttle program turns 25, NASA opened its facilities for a peek into the development of the shuttles and their successor.
At the NASA Ames Research Center outside Sunnyvale, Calif., Christine Heincke sorts out the serpent's nest of water hoses making up the cooling system for the arc jet. Testing surface materials for spacecrafts, the jet sends hot gas at supersonic speeds, reaching up to 4,000 degrees Fahrenheit.
Caption by: Bill Detwiler
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