The Atomic Race Begins

     There were three main worries of the people working on the Manhattan Project, that the Nazis would develop the bomb first, the secrecy would be blown, and it wouldn't work. If it wasn't for the Nazis working on the bomb the atomic bomb would probably not be discovered till later. The need to get the bomb developed before the Nazis was expressed in Einstein's letter.
" I understand that Germany has actually stopped the sale of uranium from the Czechoslovakian mines which she has taken over. That she should have taken such hasty action might perhaps be understood on the ground that the son of the German Under-Secretary of State, von Weiznacker, is attached to the Kaiser-Wilhelm Institute in Berlin where some of the American work on uranium is now being repeated."
Unfortunatly for Germany, Hitler and the Nazis were arresting and killing Jews, as a result hundreds of European scientists, Jewish and not Jewish, came to America and helped work on the Manhattan Project. Some of those scientists included Albert Einstein and Enrico Fermi.