<a href="https://en.wikipedia.org/wiki/Space_Shuttle_program" id="mw9g" rel="mw:WikiLink" title="Space Shuttle program">Space Shuttle program</a>: <a href="https://en.wikipedia.org/wiki/STS-41-B" id="mw9w" rel="mw:WikiLink" title="STS-41-B">STS-41-B</a> Mission: astronauts <a href="https://en.wikipedia.org/wiki/Bruce_McCandless_II" id="mw-A" rel="mw:WikiLink" title="Bruce McCandless II">Bruce McCandless II</a> and <a href="https://en.wikipedia.org/wiki/Robert_L._Stewart" id="mw-Q" rel="mw:WikiLink" title="Robert L. Stewart">Robert L. Stewart</a> make the first untethered <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Space_walk" id="mw-g" rel="mw:WikiLink" title="Space walk">space walk</a> using the <a href="https://en.wikipedia.org/wiki/Manned_Maneuvering_Unit" id="mw-w" rel="mw:WikiLink" title="Manned Maneuvering Unit">Manned Maneuvering Unit</a> (MMU).<sup about="#mwt119" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-21"}}' id="cite_ref-21" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_7#cite_note-21" id="mw_A" style="counter-reset: mw-Ref 21;"><span class="mw-reflink-text" id="mw_Q">[21]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-21"><cite about="#mwt116" class="citation book cs1" id="mwB0w"><a class="external text" href="https://history.nasa.gov/SP-4219/Chapter13.html" id="mwB00" rel="mw:ExtLink nofollow"><i id="mwB04">"More Favored than the Birds": The Manned Maneuvering Unit in Space</i></a>. NASA. 1998. p.<span id="mwB08" typeof="mw:Entity"> </span>316<span class="reference-accessdate" id="mwB1A">. Retrieved <span class="nowrap" id="mwB1E">February 7,</span> 2024</span>.</cite><span about="#mwt116" class="Z3988" id="mwB1I" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=%22More+Favored+than+the+Birds%22%3A+The+Manned+Maneuvering+Unit+in+Space&amp;rft.pages=316&amp;rft.pub=NASA&amp;rft.date=1998&amp;rft_id=https%3A%2F%2Fhistory.nasa.gov%2FSP-4219%2FChapter13.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+7"></span></span>