John E. Dhonau

L. R. Martin

S.T. Cantrill

S. T. Cantrill was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Percival “Dobie” Keith

Percival C. “Dobie” Keith was Vice President for Research and Engineering for the M.W. Kellogg Company.

Haskell Sheinberg

Haskell Sheinberg arrived at Los Alamos in late 1944 as part of the Special Engineer Detachment. Sheinberg’s first assignment was to purify plutonium under the direction of Arthur Wahl, one of the co-discoverers of plutonium.