Niels Bohr told Fermi about two scientists in Germany. Strassmann and Hahn. who were ready to break the atom and who were on the verge of a. significant nuclear discovery. Enrico Fermi. an Italian. and Niels Bohr. a Dane. went to see Professor Szilard. a Jewish refugee from the persecution of Europe. So we are talking about America as a haven. The exiled scientists talked It over. They were deeply concerned over the possibility that Hitler might achieve the bomb. They went to see another scientist by the name of Albert Einstein. another Jew. another refugee from persecution. Those four men aroused America to its peril. Albert Einstein wrote the famous letter to President Roosevelt.