Joseph J. Screnock

W. O. Lawrence

W. O. Lawrence worked for the J.A. Jones Construction Company.

Margaret Strombeck

Margaret Strombeck was a swtichboard operator at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Cardea Hubbard

Cardea Hubbard was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Juan J. Catomach