The <a href="https://en.wikipedia.org/wiki/Space_Shuttle_Columbia" id="mwASc" rel="mw:WikiLink" title="Space Shuttle Columbia">Space Shuttle <i id="mwASg">Columbia</i></a> is launched on mission <a href="https://en.wikipedia.org/wiki/STS-55" id="mwASk" rel="mw:WikiLink" title="STS-55">STS-55</a> to conduct experiments aboard the <a href="https://en.wikipedia.org/wiki/Spacelab" id="mwASo" rel="mw:WikiLink" title="Spacelab">Spacelab</a> module.<sup about="#mwt69" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-12"}}' id="cite_ref-12" rel="dc:references" typeof="mw:Extension/ref"><a href="./April_26#cite_note-12" id="mwASs" style="counter-reset: mw-Ref 12;"><span class="mw-reflink-text" id="mwASw">[12]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-12"><cite about="#mwt66" class="citation web cs1" id="CITEREFLynda">Lynda, Warnock. <a class="external text" href="https://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-55.html" id="mwBm8" rel="mw:ExtLink nofollow">"STS-55"</a>. <i id="mwBnA">www.nasa.gov</i>. NASA<span class="reference-accessdate" id="mwBnE">. Retrieved <span class="nowrap" id="mwBnI">2022-04-05</span></span>.</cite><span about="#mwt66" class="Z3988" id="mwBnM" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.nasa.gov&amp;rft.atitle=STS-55&amp;rft.aulast=Lynda&amp;rft.aufirst=Warnock&amp;rft_id=https%3A%2F%2Fwww.nasa.gov%2Fmission_pages%2Fshuttle%2Fshuttlemissions%2Farchives%2Fsts-55.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AApril+26"></span></span>