Alphonse Popolato

Otto Hillig

Otto Hillig was a Danish machinist who helped work on various projects in the early days of the Manhattan Project.

John R. Klein

John Klein was a member of the Special Engineering Detachment. He worked at the Metallurgical Lab at the University of Chicago and at Los Alamos.

F. C. Gebhart

Gebhart worked in the 200 East Area at Hanford during the Manhattan Project.

Hubert R. Donoho