National Museum of Nuclear Science & History
W. H. McWhirter worked for the J.A. Jones Construction Company.
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.
Frederic William Albaugh (1913-1999) was an American chemist. He received a Ph.D. in chemistry from the University of Michigan in 1941.
Bob Emigh was in the Navy and worked with Deak Parsons on telemetry for the bombs. He was assigned as the science officer for the planned third bomb.
Franke worked in the United States Engineer District Office.
