The <a href="https://en.wikipedia.org/wiki/Smith_Mine_disaster" id="mw7Q" rel="mw:WikiLink" title="Smith Mine disaster">Smith Mine #3</a> in <a href="https://en.wikipedia.org/wiki/Bearcreek,_Montana" id="mw7g" rel="mw:WikiLink" title="Bearcreek, Montana">Bearcreek, Montana</a>, explodes, killing 74 men.