Lloyd H. Nelson

O. L. Wright

Dennis Dwyer

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

Charles J. Spiegl

Charles J. Spiegl was a civilian scientist employed by the Manhattan Project. He was involved in radiation toxicology, studying the effects of radiation on animals at the Trinity Site near Alamogordo, New Mexico.

Stan Frankel

Stanley “Stan” Frankel (1919-1978) was an American physicist who later became a computer scientist.