Navy captain Bruce McCandless II, on the Space Shuttle Challenger’s STS 41-B mission, becomes the first human being to do a spacewalk without a safety tether linked to a spacecraft. McCandless donned a backpack mobility device—the Manned Maneuvering Unit—and ventured about 320 ft (98 m) away from the vehicle, becoming the first human satellite. His solo ride lasted 1 hour and 22 minutes. More
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