National Museum of Nuclear Science & History
B. H. Ronfeld served in the 509th Headquarters.
Eleanor Granert was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
W. Petterson worked for the United States Engineer District Office.
Joseph H. Cummins served in the 320th Troop Carrier Squadron.
Ben Benjamin was a sergeant in the Special Engineer Detachment during the Manhattan Project. He had previously worked in industry making lenses and prisms, and was assigned to the Optics Group to help with photographing the Trinity Test.