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40 Years Ago: STS-41B, the First Flight of the Manned Maneuvering Unit - NASA

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On Feb. 3, 1984, space shuttle Challenger took off on its fourth flight, STS-41B. Its five-person crew of Commander Vance D. Brand, Pilot Robert L. “Hoot”

STS-41B - NASA

SPACE SHUTTLE PROGRAM HISTORY

The Iconic Photos from STS-41B: Documenting the First Untethered Spacewalk - NASA

40 Years Ago: STS-41B, the First Flight of the Manned Maneuvering Unit - NASA

40 Years Ago: STS-41B, the First Flight of the Manned Maneuvering Unit - NASA

STS-41B - NASA

40 years since the first spacewalk without a safety cable

40 Years Ago: STS-41B, the First Flight of the Manned Maneuvering Unit - NASA

40 Years Ago: STS-41B, the First Flight of the Manned Maneuvering Unit - NASA