C. H. Hemmel, Jr.

William R. Stewart

William Stewart was an engineer in the Special Engineering Detachment at Los Alamos, New Mexico. Specifically, Stewart worked in “Project Trinity” under the leadership of George Kistiakowsky and Kenneth Bainbridge.

V. E. Helgesen

V. E. Helgesen worked for the William A. Pope Company.

F. F. Vlacil

Vlacil worked at the 300 Area at Hanford during the Manhattan Project. 

Oscar E. Graham