National Museum of Nuclear Science & History
R.J. Stepheson was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Rachel Gilbreath was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hart worked for Stone and Webster Engineering Corporation.
Elizabeth Painter (later Elizabeth Painter Marcus) was an associate biologist in the Health Division at the University of Chicago Metallurgical Laboratory.
