[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/WORLD/meast/02/11/iran.revolution.anniversary/t1main.ahmadinejad.rally.jpg caption="Thousands of pro- and anti-government demonstrators rallied in Tehran as President Ahmadinejad confirmed Iran has upped its uranium enrichment."]
Tehran, Iran (CNN) - Attacks and clashes were reported in Iran's capital Thursday as thousands of pro- and anti-government demonstrators took to the streets of Tehran to mark a key national anniversary.
Pro-government supporters filled Azadi, or Freedom, Square in central Tehran to hear President Mahmoud Ahmadinejad speak on the 31st anniversary of the Islamic Revolution, which toppled a Western-backed monarch and transformed Iran into an Islamic republic.
In a speech that lasted more than an hour, Ahmadinejad confirmed that his country had now enriched uranium to 20 percent - sufficient, scientists say, to create a nuclear reaction.
He added that Iran is capable of enriching uranium up to 80 percent but won't. FULL STORY