Donald E. Matthews

Richard H. Warrell

H.M. Jones

Jones worked at the 100-B Area at Hanford during the Manhattan Project.

A. H. Harmon

Harmon worked for Stone and Webster Engineering Corporation.

Fredrick “Fred” D. Johnson

Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.