Medical experts are witnessing an increase in the number of brain injuries sustained by soldiers fighting in Afghanistan and Iraq, prompting Veterans Affairs hospitals to set up special centers to handle the severe cases.

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Review brief histories of Syria's relations with its neighbors: Iraq, Turkey, Lebanon, Jordan, and Israel.

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The relationship between Syria and the United States, a relationship marred by more than four decades of mutual distrust, deteriorated sharply following the assassination of former Lebanese Prime Minister Rafik al-Hariri.

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As Iranian President Mahmoud Ahmadinejad continues to court world leaders and openly defy the United States, Margaret Warner looks at what the ascendant Islamic republic wants to achieve with its growing influence.

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Senate Minority Leader Harry Reid, D-Nev., discusses Republican accusations that Democrats are emboldening terrorists, the war in Iraq and what Tuesday's primary results suggest about his party's chances of taking back the House or Senate in November.

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Violence in Iraq continued, as the bodies of some sixty gunshot victims were discovered in Baghdad, nearly forty Iraqis were killed by bomb and mortar attacks and the U.S. military announced the deaths of two more American soldiers. A reporter…

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President Bush defended the invasion of Iraq this week, drawing criticism from Democrats who claimed he was politcizing the Sept. 11 anniversary. Two senators debate the war and the disputed link between Iraq and al-Qaida.

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On the fifth anniversary of the Sept. 11 attacks, memories of the destruction and victims remain fresh in people's minds. Eight Americans talk to Jim Lehrer about how the day's events have impacted their lives.

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As the United States formally transferred control of Iraq's military force to Prime Minister Nouri al-Maliki's government Thursday, sectarian violence continued in Iraq. Army Lt. Gen. Peter Chiarelli, commander of the multi-national forces, discusses the handover and new interrogation rules.

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Sgt. Lazaro Arocha, a New Yorker who joined the Marines one day following the Sept. 11 attacks, served in Iraq, and is now a recruiter, shares his story as the first in a series on Americans changed by 9/11.

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