Howard T. Parr

Hugo Leckelt

Hugo Leckelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Ruth J. Brackett

Brackett worked in the United States Engineer District Office.

Shelton A. Shuping

E. L. Douglas

E. L. Douglas worked for the Tennessee Eastman Corporation at the Y-12 Plant.