In Pajamas Media, from a CIA mole who worked inside the Iranian Revolutionary Guard:
The rulers in Iran believe it is their duty to prepare the circumstances for the reappearance of the 12th Imam. “Our Revolution’s main mission is to pave the way for the reappearance of the 12th Imam, Imam Mahdi,” Ahmadinejad said during a speech in 2005 to leaders from across the country. Shiites believe the reappearance of the 12th Imam will bring justice and peace to the world by establishing Islam throughout the world. They believe he will reappear when the world has fallen into chaos. It is believed the chaos will start in Afghanistan and then move into Iraq, where there will be blood and destruction everywhere (already in the works) and from there to the world with burning dark clouds (nuclear war). The 12th Imam will then come to destroy the “Dajjal,” the False Messiah, free the world from oppression and aggression, and then bring justice where it will be heaven on earth for many years to come. It is said Jesus will reappear at the same time and fight alongside Mahdi.Richard Fernandez (Wretchard) overviews Iran and world politics better than anyone I have read. link
Members of the Iranian leadership say they have a “signed contract” with the 12th Imam and are doggedly pursuing nuclear weapons to bring on that catastrophe. Iran’s president, Ahmadinejad, has said that Israel must be destroyed (2005 “World without Zionism” speech, “Israel must be wiped off the map”). This is no idle threat.