Revolution Day in Iran Splits Populace

Thirty-one years ago today, Islamic clerics in Iran shook the world, leading a revolution fueled by hatred of the West. The Islamic republic itself now faces unrest -- from within, as a protest movement continues to build. Today, thousands of demonstrators flooded the streets of Tehran, in shows of both support and protest. What legacy has more than four decades of Islamic rule left on the country and the region? What options does it have for coping with pressure from within and from Iranians outside who are pushing for change? What options does the West have in dealing with Iran's nuclear ambitions?