In the <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwATU" rel="mw:WikiLink" title="Soviet Union">Soviet Union</a>, the uncrewed <a href="https://en.wikipedia.org/wiki/Buran_(spacecraft)" id="mwATY" rel="mw:WikiLink" title="Buran (spacecraft)">Shuttle <i id="mwATc">Buran</i></a> makes its only space flight.