National Museum of Nuclear Science & History
D. Andrews worked for the H. K. Ferguson Company.
Ross H. Johanson served in the 603rd Air Engineering Squadron.
Lawrence Litz was a young physicist when he began working on radioactivity at the Metallurgical Laboratory at the University of Chicago.
Ernest C. Lawrence was a millwright at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
