William O. Collins

H. O. Ramey

H. O. Ramey worked for the Tennessee Eastman Corporation at the Y-12 Plant.

W. M. Fowler

Fowler worked for Stone and Webster Engineering Corporation.

Fabio F. Dioguardi

Opal MacDonald

Opal MacDonald was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.