Onel A. Sprague

John J. Griffith

Frank E. Keene

Frank E. Keene was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

M.P. Johnson

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

Fermin Vigil

Fermin Vigil was a staff worker at Los Alamos during the Manhattan Project.