National Museum of Nuclear Science & History
Leo Safranski was a research associate at the Metallurgical Laboratory in Chicago during the Manhattan Project.
R. R. Tippy worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Raymond. J. Bosnak was an electrical engineer at Chicago when he enlisted in the Army. He was assigned to the Special Engineer Detachment at Los Alamos.
Leo Seren (1918-2002) was an American physicist. Seren (in photo, first row standing, far right) was born on May 9, 1918.
Lillian Sexton was a switchboard operator at the Metallurgical Laboratory in Chicago during the Manhattan Project.