The tight battle for the 2008 Democratic presidential nomination is putting the formerly obscure super delegate system under scrutiny. A government professor discusses the role of the appointed super delegates in the Democratic nomination.
Environmental issues such as climate change and energy use have been frequent topics on the 2008 presidential campaign trail with both GOP and Democratic hopefuls offering policy plans. Two analysts examine the candidates' differing proposals to address climate issues.
Osama bin Laden addressed the American people in a new al-Qaida video that was broadcast on Al-Jazeera television Friday. Security analysts assess what it says about bin Laden's status and what it could mean for the United States.
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