National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Robert Bower served in the 603rd Air Engineering Squadron.
W. H. Reimers Jr. served in the 390th Air Service Group.
George Placzek was a Czech physicist. He was born in Brno, Moravia, which was then part of Austria-Hungary but today is in the Czech Republic.