Astronauts F. Story Musgrave, left, and Donald H. Peterson float in the cargo bay of the Earth-orbiting space shuttle Challenger during their April 7, 1983 extravehicular activity on the STS-6 mission. Their "floating" is restricted via tethers to safety slide wires. Thanks to the tether and slide wire combination, Peterson is able to translate, or move, along the port side hand rails.
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