In 1938, Otto Hahn and Fritz Strassman were two German scientists who demonstrated nuclear fission. Nuclear fission released an enormous amount of energy called nuclear energy that can be used in many ways, including a dangerous weapon. They found that they could split the nucleus of a uranium atom by bombarding it with neutrons. As a result, the uranium nucleus splits some of its mass to be converted to energy. Other physicists noticed that the fission of one uranium atom gave off extra neutrons, which could in turn split other uranium atoms, starting a chain reaction. Therefore, in theory this energy could be harnessed to make a powerful bomb. Due to this, the development of the ultimate power took many scientists a lot of hard work and dedication to create such an effective bomb. First and foremost, there were problems with the political and social climate of the world that caused a race to unfold in the development of the ultimate weapon. During this period of time World War II was going on, and the United States was fighting with Germany in the Atlantic, as well as Japan in the Pacific. It all started when Adolf Hitler and the Nazis attacked Poland on September 1, 1939, in which the other countries had joined the war for help. As a result, when Leo Szilard heard that Germany had found out about Hahn and Strassman's discovery he thought they would produce a bomb. Leo Szilard told them that they were attempting to purify Uranium-235, which would make up the atomic bomb. With that being said, he needed to get this valuable information to Franklin D. Roosevelt, the president of the United States at the time, but he did not know how to accomplish that. After some thinking he finally came to a conclusion and thought of Albert Einstein, and his connection with the United States. So, he went to Einstein and they both sent a warning letter to President Roosevelt. In addition, Leo Szilard and Albert Einstein were both Jewish scientists,