3. Marking The First Untethered Spacewalk

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• This Month In NASA History: Astronauts Make First Untethered ...

• 35 Years Ago: First Untethered Spacewalk - Kennedy Space Center

• Astronaut Bruce McCandless On First-ever Untethered Spacewalk

• First Untethered Spacewalk - Physics Today - Scitation

• First Person To Walk Untethered In Space Gives A Final Interview

• Walking Untethered In Space - The Hindu

• Fact Check: Image Of The First Untethered Spacewalk Is Altered

• Navy Captain Becomes The First Human To Perform An Untethered ...

• Extravehicular Activity - Wikipedia

• Every-Day Edit: The First Untethered Space Walk | Education World

• This Day In History: NASA And The First Untethered Spacewalk

• The Spacewalk From Hell | Air & Space Magazine

• Bruce McCandless And The Manned Maneuvering Unit (MMU)

• Untethered Spacewalk | Space Exploration | Britannica