O. W. Williams

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.

D. MacDonald

MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.

Jessie L. Thompson

Edith H. Fletcher