Jacob Perez

Helen E. Krinek

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.

H. F. Cleary

Cleary worked for Stone and Webster Engineering Corporation.

Herman R. Croft, Jr.

Herman Croft, Jr. worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Chester T. Klein