John O. Barker

Ralph Gardner-Chavis

Ralph Alexander Gardner-Chavis (1922-) is a chemist and pioneer of hard plastics who worked at the University of Chicago’s Met Lab during the Manhattan Project.

Luther Thompson

Thompson worked for Stone and Webster Engineering Corporation.

Delbert F. Johnson

Delbert Johnson was a mechanical engineer with the Special Engineer Detachment (SED) at Los Alamos. Johnson worked under 1st Lieutenant Howard C.

E.N. Hull