National Museum of Nuclear Science & History
Long worked for Stone and Webster Engineering Corporation.
J. H. Neumann worked for the J.A. Jones Construction Company.
Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Cecil B. Flournoy served in the 603rd Air Engineering Squadron.
Mary Lou Curtis joined the Manhattan Project in Dayton, Ohio in 1943. Mrs. Curtis worked in the Counting Room at Monsanto’s Unit III facility, where she developed new methods to measure and analyze radioactive materials, such as polonium, which was used as the trigger for the atomic bombs.
