William O. Shropshire

Frank P. Erichsen

Major Frank P. Erichsen worked at 100-F Area at Hanford during the Manhattan Project. One of the leading U.

J. D. Brown

J. D. Brown worked for the Watson-Flagg Engineering Company.

R.E.F. Seymour

Mary McCormick

Mary McCormick was a secretary at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.