At two o'clock in the morning on August 29, 1949, the first nuclear atomic bomb was dropped, known as "First Light." It was deposited at the Semipalatinsk test site 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 observe the assembly work, then return and show Joseph Stalin, the Soviet leader, their progress. One of the main reasons for producing this bomb was to teach the Soviet Union about the effects of nuclear bombs. Since the effects were the main goal of the atomic bomb, the USSR built tunnels, bridges, water towers, buildings, wooden buildings. houses, brick houses and other types of structures nearby. There were also all types of animals in cages 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, to the weapons laboratory in Russia, and then to the test site in Russia. Kazakhstan, which was three thousand kilometers from Arzamas. The bomb was going to be tested in a tower built by the Soviet Union. When building this tower, they placed the device in a concrete hall, with railroad cars everywhere. This was so that the bomb pieces could go in on one side and the finished product was transported to the other side to be taken to the top of the tower for testing. Although the atomic bomb hit the ground at two o'clock in the morning, it was originally scheduled to be tested at six o'clock in the morning... middle of newspaper...... support of the nations. » About a month later, a man named Klaus Fuchs, a German physicist, was arrested for giving the Soviet Union secret information to help them develop the atomic bomb. During World War II, Fuchs was stationed at the American atomic development headquarters. Fuchs gave the USSR information about the American program, including the plan for the atomic bomb known as "Fat Man", which was later dropped on Japan. He also told them everything the Los Alamos scientist knew regarding the hydrogen weapon hypothesis. In conclusion, the development of the “First Lighting” nuclear atomic bomb was a great success for the USSR and improved the security system. This wouldn't have happened if everyone hadn't worked together. Over the years, nuclear weapon inventions have each had an impact on the creation of a new nuclear weapon..