A development and implementation leader into Hiroshima Atomic Bomb for the first time in human history

They were a substantial development and implementation leader of the first atomic bomb in human history. The person on the right is Julius Robert Oppenheimer, Ph.D. who was a developer. The person on the left was, Leslie Richard Groves, the executive. Leo Szilard and Albert Einstein on August 2nd, 1939 had appealed Atomic Bomb Crisis by Nazi German to President Roosevelt, who commanded the beginning of the atomic bomb development by the Manhattan plan. From September 1942, Globus was appointed for the executive director and implemented confidentially the Manhattan plan of Atomic Bomb within the Army, which was invested a budget of 2.2 billion dollars. On March, 1943 Oppenheimer was appointed the Director at Los Alamos National Laboratory and led the development of the atomic bomb. On July 16, 1945, Oppenheimer succeeded the Trinity Atomic Bomb experiment and on July 23, Groves ordered the atomic bomb into Hiroshima City.