National Museum of Nuclear Science & History
John C. Pfeiffer Jr. served in the 393rd Bombardment Squadron.
Helen E. Krinek was a research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Peter P. Kolasinski, Jr. served in the 1395th Military Police Company, Aviation.
Walter Samuel Carpenter, Jr. was a corporate executive at DuPont who oversaw the company's involvement in the Manhattan Project.
