 Since Deutsch was still a German subject in 1941 (Germany annexed Austria in 1938; under the Nuremberg Laws, Jews were stripped of their citizenship and considered "subjects" of the Reich), he was classified by the U.S. Government as an enemy alien.Deutsch was a committed anti-fascist, and wanted to help in the war effort, and so he had to wait for two years to receive a security clearance.During that time, he taught and did research at MIT.