<a href="https://en.wikipedia.org/wiki/Nuclear_weapons_testing" id="mwAWo" rel="mw:WikiLink" title="Nuclear weapons testing">Nuclear weapons testing</a>: The United States successfully detonates <a href="https://en.wikipedia.org/wiki/Ivy_Mike" id="mwAWs" rel="mw:WikiLink" title="Ivy Mike">Ivy Mike</a>, the first <a href="https://en.wikipedia.org/wiki/Thermonuclear_weapon" id="mwAWw" rel="mw:WikiLink" title="Thermonuclear weapon">thermonuclear device</a>, at the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Eniwetok" id="mwAW0" rel="mw:WikiLink" title="Eniwetok">Eniwetok</a> atoll. The explosion had a yield of ten megatons <a href="https://en.wikipedia.org/wiki/TNT_equivalent" id="mwAW4" rel="mw:WikiLink" title="TNT equivalent">TNT equivalent</a>.