Military use of atomic energy was an interest to foreign physicists living in the United States, who included Enrico Fermi, Leo Szilard, Eugene Wigner, Edward Teller, and Victor Weisskopf. All of these physicists knew that any German breakthrough or research on nuclear weapons at the Kaiser Wilhelm Institute in Berlin would be a problem not only for their homeland but, for millions of people around the globe. Germany, however, despite its advanced weapons couldn't manage to build an atomic bomb. The German nuclear weapon project, or “Uranium Club” was led by Werner Heisenberg, a German physicist. The project, however, had several flaws, including a lack of government support and understanding of how to build an atomic bomb. One of the issues was that the Nazis couldn't figure out what levels of key elements were needed. For example, they miscalculated the amount of graphite and heavy water needed for a moderator. This was one of many issues that hindered the Nazis from completing an atomic …show more content…
Roosevelt warning of a calamitous event if the United States failed to develop an atomic bomb before Germany. By mid-July of 1939, Germany had advanced its findings of isotope separation, which could of been used to achieve a “fast- neutron chain reaction in U-235, the basis of the atomic bomb.” This was shocking to the group of physicists, and as a result they reported to the White House and spoke with Alexander Sachs, who was an informal advisor to President Roosevelt and was aware of the nuclear atomic research in Germany. Being aware of the potential hazards that could occur if German research went on, Sachs and the group of physicists decided that if the prestigious scientist Albert Einstein was involved in their efforts that Roosevelt would be more likely to take notice of the escalating dilemma. On August 2, Leo Szilard and Edward Teller succeeded in getting Einstein to sign the letter urging the President to support an atomic weapons research program. With the signed letter, Sachs was able to meet with Roosevelt on two different occasions on October 11 and 12. During the meetings Sachs described the dangers of the German research and the amount of money needed to fund a program in the United States. As a result, Roosevelt agreed to support atomic research to develop nuclear weapons. This project soon came to be known as the Manhattan Engineer District or “Manhattan Project,” which would