IN GENERAL.—The Secretary of State shall deny a visato, and the Secretary of Homeland Security shall exclude fromthe United States, any alien who is a citizen of Iran that theSecretary of State determines seeks to enter the United Statesto participate in coursework at an institution of higher education(as defined in section 101(a) of the Higher Education Act of 1965(20 U.S.C. 1001(a))) to prepare the alien for a career in the energysector of Iran or in nuclear science or nuclear engineering or arelated field in Iran.
http://www.nacua.org/documents/IranNuclearThreatBill.pdf
http://www.nacua.org/documents/IranNuclearThreatBill.pdf