Protests in Iran Mark 31 Years Since Revolution Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Iranian President Mahmoud Ahmadinejad addresses tens of thousands of Iranians gathered in Azadi (Freedom) Square in southwestern Tehran to mark the 31st anniversary of the Islamic revolution ( Getty Images ) Produced by Noel King Produced by PRI and WNYC