Kenneth F. Stone

Helene M. Smith

Helene Smith was a laboratory technician in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Ruth I. Crosse

E. V. Lofstrum

E. V. Lofstrum worked for the J.A. Jones Construction Company.

Roy V. Henderson

Roy V. Henderson was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.