The former American president, Jimmy Carter, has said that the United States should begin talks with Iran without preconditions. Mr Carter believes prerequisites could present the Iranian Government with too great an impediment to overcome. His comments are significant, given that he was the president when US relations with Iran hit an all-time low. He witnessed the Iranian revolution and the seizure of the American Embassy in Tehran in 1979. He struggled for 444 days to release the US Embassy staff held hostage. A failed rescue attempt led by the US military brought about the resignation of his secretary of...