H. A. Moulthrop

Paul E. Rowe

C. O. Hubbard

C. O. Hubbard worked for the Roane-Anderson Company.

Secundino Roybal

Secundino Roybal was a staff worker at Los Alamos during the Manhattan Project.

T. J. O’Donnell

T. J. O’Donnell was the Shop Chief at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.