Town Hall Debate

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Last night's presidential debate turned into a prime-time political confrontation, this time including a president fully engaged with a challenger ready for action. We hear excerpts and contrasting assessments. On Reporter's Notebook, a new planet has been discovered — orbiting the closest star to the Sun. What are the prospects of life in the system of Alpha Centuri B?  

Banner image: Republican presidential nominee Mitt Romney (L) and President Barack Obama gesture towards each other during the second US presidential debate in Hempstead, New York, October 16, 2012. Photo by Mike Segar/Reuters