William E. Liebeck

Joyce M. Hopkins

Joyce M. Hopkins was a research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Fredrick “Fred” D. Johnson

Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. L. Sitton

E. Hilgeman

Hilgeman worked at the 100-D Area at Hanford during the Manhattan Project.