Iran Teeters on the Brink

It began last summer as a protest over a disputed presidential election. It blossomed last fall into an awe-inspiring revolt against the very nature of the regime. Now, on the eve of the 31st anniversary of the Islamic Republic, as Iran braces for what could be the largest and most violent demonstrations since the election that returned Mahmoud Ahmadinejad to power, the country may be on the brink of civil war.