John K. McArthur

William C. Matthei

Matthei worked for Stone and Webster Engineering Corporation.

C. T. Woolum

C. T. Woolum worked for the Roane-Anderson Company.

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.

Max Gilbert