Leo P. Hassen

Henry Robert Barwick

Henry Barwick worked as a plumber, pipefitter, and steamfitter during the building of the Y-12 plant at Oak Ridge.

Mary E. Parrish

Mary E. Parrish was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

E. J. Brenneis

E. J. Brenneis worked for the Tennessee Eastman Corporation at the Y-12 Plant.

H. R. Craig