H. Torrey Walker Jr.

Jay Wechsler

Jay Wechsler enlisted in the Army in 1943 and spent several months at Oak Ridge working as an Army construction engineer, In the winter of 1943, he was suddenly transferred to Los Alamos, where he began working directly with Otto Frisch.

Andrew J. Welch

Andrew Welch was a janitor at the Chicago Met Lab during the Manhattan Project.

T. J. Armstrong

Daniel J. Mullane

Daniel Mullane worked in Los Alamos from 1943 to 1945 as a technician. He helped develop a source holder for the uranium gun-type bomb before moving back to Detroit after the war.