H. VanDerHorn

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.

Ralph J. Belcher

Earl Kingston, Jr.

Earl Kingston, Jr. served in the 603rd Air Engineering Squadron.

John G. Ryan

John Ryan was a staff worker at Los Alamos during the Manhattan Project.