A new Iranian Revolution?

"Ahmadi bye-bye." That's one of the chants that supporters of Iranian presidential candidate Mir Hossein Mousavi were yelling Monday when they decked out in green and formed a stunning human chain along a 12-mile-long arterial road that runs through Tehran.

Many Iranians are fed up with President Mahmoud Ahmadinejad -- the man who has presided over a crumbling economy and damaged Iran's international standing. They head to the polls Friday to select one of four candidates, and if the outcome is "Ahmadi bye-bye," the most-likely new president would be Mousavi, a relative unknown until recently.

FP has an Iran package to keep you in the know. Check it out:

Iran's Presidential Wannabes: Meet the four men vying to lead the Islamic Republic and learn where they stand on foreign policy and domestic politics.

Iran's Potato Revolution: Former Prime Minister Mir Hossein Mousavi has spent the past two decades out of the public eye, pursuing his interests in architecture and painting. Now he's the man most likely to dethrone Ahmadinejad.

Who's Winning Iran's Google War? To understand Iranian politics, ask a search engine. Over the past 90 days, Farsi-language Google searches for "Mousavi" have increased 1,300 percent.

Iran's New Revolution: Candidate Mousavi may have less charisma than Michael Dukakis, but the rock star has Iranian youth screaming.

Ahmadi Bye-Bye in Iran? A photo review of the best moments from Iran's wild campaign.

Photo: Majid/Getty Images