Hugo Griep

Stephen Kosh

Stephen Kosh served in the 603rd Air Engineering Squadron.

Al Brown

Daniel J. Keefe

Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Ruth Hillard

Ruth Hillard was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.