At two in the morning on August 29, 1949, the first nuclear atomic bomb, known as the "First Lightning", was dropped. It was launched at the test site in Semipalatinsk in Kazakhstan. This nuclear bomb was produced by the Union of Soviet Socialist Republics (USSR), also known as the Soviet Union. Igor Kurchatov was the director of the Soviet nuclear bomb scientific program. There were two practice rounds two weeks before the explosion. During these two weeks the Special Committee on the Atomic Bomb sent Lavrentii Beria to witness the assembly's proceedings, then return and show Joseph Stalin, the Soviet leader, their progress. One of the main reasons for the production of this bomb was to teach the Soviet Union the effects of nuclear bombs. Since the effects were the main purpose of the atomic bomb, the USSR built tunnels, bridges, water towers, buildings, wooden structures. houses, brick houses and other different types of structures nearby. There were also all different types of animals caged so they could examine the effects of nuclear radiation. The Soviet Union used a train to ship all the components needed to create this bomb, from the weapons laboratory in Russia to the test site in Kazakhstan, which was two thousand miles from Arzamas. The bomb would be tested in a tower built by the Soviet Union. During the construction of this tower they placed the device in a concrete room, with train cars scattered everywhere. This way the bomb pieces could enter from one side and the finished product was transported from the other side and taken to the top of the tower for testing. Although the atomic bomb hit the ground at two in the morning, it was originally scheduled to be tested at six in the morning in the middle of the paper. The support of the nations. About a month later, a man named Klaus Fuchs, a German physicist, was arrested for giving secret information to the Soviet Union to help them develop the atomic bomb. During World War II Fuchs was assigned to the U.S. Atomic Development Headquarters. Fuchs provided the USSR with information on the US program, including the design of the atomic bomb known as “Fat Man,” which was later dropped on Japan. He also told everything the Los Alamos scientist knew about the hypothetical hydrogen weapon. In conclusion, the development of the “First Lighting” nuclear atomic bomb was a great overall success for the USSR and improved the safety system. This wouldn't have happened if everyone hadn't worked together. As the years went by the inventions of nuclear weapons came every time a new one was created.