National Museum of Nuclear Science & History
Ed Helfenberger worked for the Roane-Anderson Company.
Dorothy C. Johnson was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Samuel Proctor Massie Jr. (1919-2005) was an African American chemist who worked on the Manhattan Project.
Frank McLaughlin served in the 1st Ordnance Squadron.
