William G. Johnson

E. R. Smallwood

E. R. Smallwood served in the 509th Headquarters.

Marguerite N. Swift

Marguerite Swift was an associate physiologist in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Blanche J. Lawrence

Blanche J. Lawrence was an African-American research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Wesley Cowan