On this mission the first untethered space walks were carried out by McCandless and Stewart, using the manned maneuvering unit.
Vintage 1980's souvenir NASA collectible embroidered patch features the Space Shuttle Challenger STS-41B notable for achieving the first untethered
Vintage circa 1980's to 1990's Space Shuttle Challenger STS-41B NASA collectible crew patch
Vintage Space Shuttle Challenger 1984 STS-41B NASA Embroidered Patch Crew Names
Physics in Your World Archive - Page 1
Space Shuttle Challenger - Sts - 41B Crew - Inscribed Printed Photograph Signed In Ink With Co-Signers
STS-41B - NASA
STS-41-B - Wikipedia
Challenger STS 41-B / First MMU EVA and first KSC landing - Screenshots
NASA, Historic mission of the space shuttle Challenger (STS 41B) (1984)
Space Shuttle Challenger - Sts - 41B Crew - Inscribed Printed Photograph Signed In Ink With Co-Signers
STS-41B - NASA
Space Shuttle Missions (1-50)
STS-41-B - Wikipedia
