National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
Dr. Joseph Katz was a chemist at Argonne National Laboratory at the Metallurgical Lab in Chicago. Katz was a part of a team that studied ways to make the diffusion of U-235 to U-238.
Cecil Bennett served in the 390th Air Service Group.
Evelyn Dunbar was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
