R. S. Stone

Lester Orlan Keen

Lester Orlan Keen worked as an engineering draftsman at Hanford during the Manhattan Project. His son, Jack Keen, was a young boy at the time.

Ambroso Hoelscher

Ambroso Hoelscher was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Frazier Riddlesperger

William L. Kessig