The <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwASs" rel="mw:WikiLink" title="Soviet Union">Soviet</a> <a href="https://en.wikipedia.org/wiki/Tupolev_Tu-144" id="mwASw" rel="mw:WikiLink" title="Tupolev Tu-144">Tupolev Tu-144</a> becomes the first commercial transport to exceed <a href="https://en.wikipedia.org/wiki/Speed_of_sound" id="mwAS0" rel="mw:WikiLink" title="Speed of sound">Mach 2</a>.