The <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwAQA" rel="mw:WikiLink" title="Soviet Union">Soviet Union</a> successfully conducts a long-range test flight of the <a href="https://en.wikipedia.org/wiki/R-7_Semyorka" id="mwAQE" rel="mw:WikiLink" title="R-7 Semyorka">R-7 Semyorka</a>, the first <a href="https://en.wikipedia.org/wiki/Intercontinental_ballistic_missile" id="mwAQI" rel="mw:WikiLink" title="Intercontinental ballistic missile">intercontinental ballistic missile</a>.<sup about="#mwt72" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-13"}}' id="cite_ref-13" rel="dc:references" typeof="mw:Extension/ref"><a href="./August_21#cite_note-13" id="mwAQM" style="counter-reset: mw-Ref 13;"><span class="mw-reflink-text" id="mwAQQ">[13]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-13"><cite about="#mwt69" class="citation book cs1" id="CITEREFBurgessHall2009">Burgess, Colin; Hall, Rex (2009). <i id="mwBz8">The First Soviet Cosmonaut Team: Their Lives, Legacy, and Historical Impact</i>. Berlin: Springer. p.<span id="mwB0A" typeof="mw:Entity"> </span>16. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwB0E" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwB0I" typeof="mw:Entity"> </span><a href="./Special:BookSources/9780387848235" id="mwB0M" rel="mw:WikiLink" title="Special:BookSources/9780387848235"><bdi id="mwB0Q">9780387848235</bdi></a>. <a class="mw-redirect" href="./LCCN_(identifier)" id="mwB0U" rel="mw:WikiLink" title="LCCN (identifier)">LCCN</a><span id="mwB0Y" typeof="mw:Entity"> </span><a class="external text" href="https://lccn.loc.gov/2008935694" id="mwB0c" rel="mw:ExtLink nofollow">2008935694</a>.</cite><span about="#mwt69" class="Z3988" id="mwB0g" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+First+Soviet+Cosmonaut+Team%3A+Their+Lives%2C+Legacy%2C+and+Historical+Impact&amp;rft.place=Berlin&amp;rft.pages=16&amp;rft.pub=Springer&amp;rft.date=2009&amp;rft_id=info%3Alccn%2F2008935694&amp;rft.isbn=9780387848235&amp;rft.aulast=Burgess&amp;rft.aufirst=Colin&amp;rft.au=Hall%2C+Rex&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAugust+21"></span></span>