National Museum of Nuclear Science & History
Charles Helmers worked for the J.A. Jones Construction Company.
A. F. Tyra worked for the Union Carbide & Carbon Corporation.
A. O. Garberg worked for the Tennessee Eastman Corporation at the Y-12 Plant.
George Cowan joined the Manhattan Project in 1942 at the Met Lab as a chemist for Enrico Fermi’s group, and also worked for Columbia University.
