H. F. Pyatt

Y.W. Jones

Clarence H. Mathews

Clarence H. Mathews was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

P. A. Dahlen

P. A. Dahlen worked at the 100-D Area at Hanford during the Manhattan Project.

Stanley Blazyk

Blazyk worked for Stone and Webster Engineering Corporation.