According to the Guardian, a senior British Foreign Office official said that while it could take Iran several years to build a serviceable nuclear weapon, it might gain the technical know-how within months. "By the end of the year is a ... realistic period," said the official. "It would be really damaging to regional security if Iran even acquired the technology to enable it to develop a nuclear weapon." This reminds me of the 45 minute claim about Iraq!
In an interview with Germany's Die Welt newspaper, former U.S. secretary of state Henry Kissinger has said that it is possible to reach a deal with Iran on its nuclear program. Kissinger said that the US should hold constructive talks with Iran and that there are several ways to defuse Iran's nuclear impasse but the best option is to pursue negotiations.