Iran would have to remove 15,000 centrifuge machines and take other drastic measures to forge a comprehensive nuclear agreement with the West, according to a report by a U.S. think tank that drew from conversations with senior U.S. officials. The steps required to preclude Tehran’s ability to develop nuclear weapons illustrate the challenge the U.S. and other world powers will face in moving over the next six months from an interim deal to a final one. In addition to removing the thousands of centrifuges that enrich uranium, Iran would have to shut down an underground uranium-enrichment site, convert a heavy water reactor and agree to a 20-year inspections regime, according to the Institute for Science and International Security (ISIS) in Washington. The findings were provided exclusively to The Wall Street Journal. The conclusions come as the United Nations’ nuclear watchdog confirmed Monday that Tehran had begun scaling back major […]