John O. Barker

Arthur L. Hughes

Arthur L. Hughes was an British/Welsh physicist. He worked on the Manhattan Project in St. Louis on the cyclotron and plutonium production and at Los Alamos, NM.

Myrtle E. Karcher

Myrtle E. Karcher was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Raymond A. Marchlewski

Raymond A. Marchlewski served in the 1st Ordnance Squadron.

Richard E. Black