Metallurgical Laboratory
...that the Metallurgical Laboratory at the University of Chicago built the first nuclear reactor and achieved a self-sustaining nuclear reaction in December 1942?
...that the <b id="mwgg"><a href="./Metallurgical_Laboratory" id="mwgw" rel="mw:WikiLink" title="Metallurgical Laboratory">Metallurgical Laboratory</a></b> at the <a href="./University_of_Chicago" id="mwhA" rel="mw:WikiLink" title="University of Chicago">University of Chicago</a> built the first <a href="./Nuclear_reactor" id="mwhQ" rel="mw:WikiLink" title="Nuclear reactor">nuclear reactor</a> and achieved a self-sustaining <a href="./Nuclear_reaction" id="mwhg" rel="mw:WikiLink" title="Nuclear reaction">nuclear reaction</a> in December 1942?