Answer:
President Roosevelt's astonishment that the events of Kristallnacht could have even taken place in the modern world led to his extending of the visitor visas of at least 12,000 Germans visiting America, allowing them to stay for an additional 6 months so that they did not have to return to Germany. He did so multiple times, and until the war was over. Roosevelt also brought the U.S. ambassador in Berlin, from Berlin, and home to the U.S.