The <a href="https://en.wikipedia.org/wiki/R-7_Semyorka" id="mwAQQ" rel="mw:WikiLink" title="R-7 Semyorka">R-7 Semyorka</a>, the first <a href="https://en.wikipedia.org/wiki/Intercontinental_ballistic_missile" id="mwAQU" rel="mw:WikiLink" title="Intercontinental ballistic missile">intercontinental ballistic missile</a>, becomes operational at <a href="https://en.wikipedia.org/wiki/Plesetsk" id="mwAQY" rel="mw:WikiLink" title="Plesetsk">Plesetsk</a>, <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwAQc" rel="mw:WikiLink" title="Soviet Union">USSR</a>.