Leona Woods
... that Leona Woods was the only woman present when the world's first nuclear reactor went critical?
... that <b id="mwBME"><a href="./Leona_Woods" id="mwBMI" rel="mw:WikiLink" title="Leona Woods">Leona Woods</a></b> was the only woman present when the <a href="./Chicago_Pile-1" id="mwBMM" rel="mw:WikiLink" title="Chicago Pile-1">world's first nuclear reactor</a> went critical?