Astronaut Bruce McCandless Performs the First Untethered Spacewalk - NASA
Source: NASA
Astronaut Bruce McCandless II approaches his maximum distance from the Earth-orbiting Space Shuttle Challenger in this 70mm frame photographed by his fellow crewmembers onboard the reusable vehicle. McCandless is in the midst of the first "field" tryout of the nitrogen-propelled, hand-controlled back-pack device called the manned maneuvering unit (MMU). Astronaut Robert L. Stewart got a chance to test the same…
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