National Museum of Nuclear Science & History
Grace Hardin worked for the J.A. Jones Construction Company.
Blanche J. Lawrence was an African-American research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
George Ruhl worked for the Kellex Corporation at the K-25 Plant.
Alan A. Jarrett was a research assistant the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
