National Museum of Nuclear Science & History
J. C. Rieder worked for the J.A. Jones Construction Company.
Sloan worked at the 300 Area at Hanford during the Manhattan Project.
Ernest E. Wollan was a research associate at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Samuel Proctor Massie Jr. (1919-2005) was an African American chemist who worked on the Manhattan Project.