<a href="https://en.wikipedia.org/wiki/Space_Shuttle_program" id="mwAUc" rel="mw:WikiLink" title="Space Shuttle program">Space Shuttle program</a>: Space Shuttle <i id="mwAUg"><a href="https://en.wikipedia.org/wiki/Space_Shuttle_Challenger" id="mwAUk" rel="mw:WikiLink" title="Space Shuttle Challenger">Challenger</a></i> makes its maiden voyage into space on <a href="https://en.wikipedia.org/wiki/STS-6" id="mwAUo" rel="mw:WikiLink" title="STS-6">STS-6</a>.<sup about="#mwt141" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-24"}}' id="cite_ref-24" rel="dc:references" typeof="mw:Extension/ref"><a href="./April_4#cite_note-24" id="mwAUs" style="counter-reset: mw-Ref 24;"><span class="mw-reflink-text" id="mwAUw">[24]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-24"><cite about="#mwt138" class="citation web cs1" id="CITEREFUri2023">Uri, John (2023-04-06). <a class="external text" href="https://www.nasa.gov/history/40-years-ago-first-flight-of-space-shuttle-challenger/#:~:text=Following%20a%20smooth%20countdown%2C%20Challenger,begin%20the%20STS%2D6%20mission." id="mwCUE" rel="mw:ExtLink nofollow">"40 Years Ago: First Flight of Space Shuttle Challenger"</a>. <i id="mwCUI">nasa.gov</i><span class="reference-accessdate" id="mwCUM">. Retrieved <span class="nowrap" id="mwCUQ">March 23,</span> 2024</span>.</cite><span about="#mwt138" class="Z3988" id="mwCUU" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=nasa.gov&amp;rft.atitle=40+Years+Ago%3A+First+Flight+of+Space+Shuttle+Challenger&amp;rft.date=2023-04-06&amp;rft.aulast=Uri&amp;rft.aufirst=John&amp;rft_id=https%3A%2F%2Fwww.nasa.gov%2Fhistory%2F40-years-ago-first-flight-of-space-shuttle-challenger%2F%23%3A~%3Atext%3DFollowing%2520a%2520smooth%2520countdown%252C%2520Challenger%2Cbegin%2520the%2520STS%252D6%2520mission.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AApril+4"></span></span>