Secretary of State Hillary Clinton charged that Iran is headed toward becoming a military dictatorship because of the growing power of the country's powerful Revolutionary Guard. Also, at least 18 people were killed in a commuter rail crash in Belgium.

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Key Events in Iran Since 1921…

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Flag-waving crowds rallied in central Tehran on Thursday to celebrate the 31st anniversary of the Islamic Revolution in Iran, which also prompted spin-off government protests that security forces worked to disperse.

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As government backers and opposition protesters rallied in Iran Thursday to mark the 31st anniversary of the country's Islamic Revolution, tensions continued to rise between Tehran and Washington over Iran's nuclear ambitions.

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On the 31st anniversary of Iran's Islamic Revolution, President Mahmoud Ahmadinejad declared his nation had the capacity to produce weapons-grade nuclear fuel. Margaret Warner reports.

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In other news Tuesday, President Obama issued another challenge to Republicans in Congress to cooperate on a host of issues, and also warned Iran over its nuclear program.

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Iran told the U.N. International Atomic Energy Agency Monday that it would begin enriching its stockpile of uranium to 20 percent purity for a medical reactor, renewing calls from U.S., Russian and French officials for a tougher approach and unified…

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A roundup of arts headlines.

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In other news Wednesday, a motorcycle bomb tore through a crowd of pilgrims in Iraq, killing at least 23 people. In Afghanistan, U.S., NATO and Afghan forces are gearing up for their largest joint offensive yet.

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In other news Tuesday, the Nigerian man accused in the Christmas Day airliner attack is said to be cooperating with the FBI, and White House budget director Peter Orszag defended the administration's $3.8 trillion budget proposal on Capitol Hill.

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