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Shields and Brooks on Romney's Clean Bill of Health, MLB...

Shields and Brooks on Romney's Clean Bill of Health, MLB...

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Shields and Brooks on Romney's Tax Returns, '47 Percent'

Shields and Brooks on Romney's Tax Returns, '47 Percent'

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Conversation: Poet Laureate Natasha Trethewey

Conversation: Poet Laureate Natasha Trethewey

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News Wrap: U.S. Surge Troops Withdrawn from Afghanistan

News Wrap: U.S. Surge Troops Withdrawn from Afghanistan

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'Bath Salts' Have Dangerous, Bizarre Effects

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Why Students Who Underperform Drop Out of School

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News Wrap: Libyan Military Disbands 'Illegitimate' Militias

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Political Ad Spending Doubled in 2012

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Grading the Campaigns Six Weeks from Election Day

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PBS News Hour

Arctic Ice Cap Shrinks to Record Low Level

This September, the arctic ice cap melted the most ever recorded, with only 24 percent of the Arctic Ocean covered by ice. Ray Suarez talks to Walt Meier, a scientist at the U.S. National Ice and Snow Data Center about the new evidence and how a lack of arctic sea ice affects ocean currents and changes weather patterns.
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