Dow Jones Business News (New York, Dec. 13) – Iranian President Hassan Rouhani on Tuesday ordered the development of a nuclear propulsion system for ships, describing the move as a response to the recent extension of sanctions against the Islamic Republic by U.S. Congress. Many nuclear-powered vessels are fueled with uranium enriched above 90 percent, according to research by Magdi Ragheb, a professor of nuclear engineering at Illinois. The use of any grade of uranium exceeding 3.67 percent enrichment would violate the nuclear agreement between the U.S. and Iran.