In a <a href="https://en.wikipedia.org/wiki/Totskoye_nuclear_exercise" id="mw1Q" rel="mw:WikiLink" title="Totskoye nuclear exercise">top secret nuclear test</a>, a Soviet <a href="https://en.wikipedia.org/wiki/Tupolev_Tu-4" id="mw1g" rel="mw:WikiLink" title="Tupolev Tu-4">Tu-4 bomber</a> drops a 40 <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Kiloton" id="mw1w" rel="mw:WikiLink" title="Kiloton">kiloton</a> atomic weapon just north of <a href="https://en.wikipedia.org/wiki/Totskoye" id="mw2A" rel="mw:WikiLink" title="Totskoye">Totskoye</a> village.