Frank K. Wey, Jr.

Ivan L. Brown

F. B. Barker

Edward A. Smith, Jr.

Edward Smith was a chemical engineer employed by the civilian contractor Eastman Kodak at the K-25 Plant in Oak Ridge, Tennessee.

Dwight Smith Young

Dwight Young (1892-1975) was a professional photographer working at a box factory when he heard about an opening at the University of Chicago’s Metallurgical Laboratory.