
With Iran now ramping up its nuclear programs, tensions are rising between the U.S. and Tehran. So what would happen if America, or perhaps Israel, wound up taking military action against the Iranians?
In Washington, they're conducting war games to prepare for just about any scenario. Our Chris Lawrence has the report.
[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
There could now be written proof that Iran is trying to build a nuclear weapon. Experts say a new top secret document talks about a device that has no peaceful use at all.
Is it the smoking gun?
On Tuesday's American Morning, we spoke with former weapons inspector David Albright, and Robin wright, who is testifying before a House subcommittee on national security today.
It's been almost four months since three American hikers were arrested after crossing into Iran from northern Iraq. They say it was an accident, but Iran's President Mahmoud Ahmadinejad insists their case will go through his nation's courts.
Today, on the eve of Thanksgiving, the mothers of those hikers are sending a video message to their children and the leaders of Iran. Laura Fattal, mother of hiker Josh Fattal, spoke to John Roberts on CNN's "American Morning" Wednesday.
It's been three months since three Americans – Shane Bauer, Sarah Shourd, and Josh Fattal – were arrested in Iran. They reportedly crossed an unmarked border while hiking in Northern Iraq and are being held in Tehran where government officials say they now face espionage charges.
The families say it was an innocent mistake and in his first television interview, Shon Meckfessel – the "fourth" hiker, who was not arrested – told CNN's Kiran Chetry what they were all doing there in the first place.
Related: Iran to charge 3 American hikers with espionage, says prosecutor
Iran is charging three American hikers with espionage, a Tehran prosecutor said Monday.
The three Americans have been detained since July 31 on charges of illegally crossing the border from Iraqi Kurdistan into Iran. Their family and friends say it was an innocent mistake.
The announcement of the charges comes only days after U.S. Secretary of State Hillary Clinton met privately with the families of Shane Bauer, Sarah Shourd and Josh Fattal, who were detained along the Iran-Iraq border at the end of July.
Alex Fattal, the brother of hiker Josh Fattal, spoke to Kiran Chetry on CNN's American Morning Tuesday.
Read more: Iran to charge 3 American hikers with espionage, says prosecutor

