NASA Challenger Mission STS-41-B

NASA Space Shuttle Challenger Mission STS-41-B footage, narrated by members of the mission crew. NASA Astronauts Bruce McCandless II and Robert L. Stewart taking part in the first untethered extravehicular activity (EVA) spacewalk. McCandless and Stewart exiting the Space Shuttle Changer through the payload bay hatch; both wearing full spacesuits. Stewart clips his tether onto the shuttle. McCandless testing and operating the Manned Maneuvering Unit (MMU); conducting the first untethered spacewalk. McCandless discusses the spacewalk and using the MMU. McCandless operating the MMU in space above Earth. McCandless discusses the use of the MMU in the upcoming Solar Maximum Mission. Crew discusses the plans to retrieve McCandless or Stewart, if they experienced any issues while using the MMU.