Iran’s top nuclear negotiator said Tuesday that Iran will withdraw from all cooperation with the U.N. nuclear watchdog agency if the U.N. Security Council imposes sanctions against it. The statements by Ali Larijani came a day after Iran’s president — facing a Friday U.N. deadline to stop uranium enrichment — boldly predicted the Security Council would not impose sanctions on Tehran and and warned he was thinking about dropping out of the Nuclear Nonproliferation Treaty. Full Story