National Museum of Nuclear Science & History
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.
Frei worked for Stone and Webster Engineering Corporation.
H. E. Johnson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
