J. Arthur Widmer

Daniel J. Keefe

Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Al Brown

Elsie C. Harrington

Elsie Harrington was a civilian RO Operator at Oak Ridge, Tennessee from October 1943 to February 1947.

S. C. Barnett

S. C. Barnett worked for the Union Carbide & Carbon Corporation.