Today, 83 years ago, on December 2, 1942 (Calendar, October 25, 1942) the atomic fission succeeded. Scientist Fermi held an atomic model on December 2, 1942, at the metallurgical laboratory of the University of Chicago led by A-H-Compton, the first controlled atomic nuclear chain reaction opened the way for atomic bombs and nuclear energy. Scientists built a nuclear reactor made up of uranium and graphite on the tennis court of the University of Chicago. The critical moment arrived at 3:45 p.m. The shift of the control pile meant that the neutrons generated from the fissioned uranium atoms hit other atomic chains to sustain the reaction. The atomic reactor was part of Manhattan¡¯s secret program to make atomic bombs. The Manhattan Plan was an American government