With Brazil's global status on the rise, the United States is re-evaluating its approach to Latin American policy. Margaret Warner reports on Secretary of State Hillary Clinton's trip to several South American nations.

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In other news Friday, the Justice Department found no misconduct by Bush administration lawyers who authorized harsh interrogations. Also, home foreclosures fell in the final quarter of 2009, signaling a possible rebound in the housing market.

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Secretary of State Hillary Clinton advised continuing to pressure Iran on its nuclear ambitions after her return from the Middle East Wednesday. Iran's supreme leader, Ayatollah Ali Khamenei, accused Clinton of lying and condemned the "bullying" of Western nations over…

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In other news Tuesday, Iranian President Mahmoud Ahmadinejad warned that Tehran would swiftly counter any new sanctions placed against it and Russia joined the U.S. and France to urge Iran to stop enriching uranium.

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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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