Deep freeze grips U.S.

Associated Press
A man is bundled up against the cold on New York's 34th Street in Midtown Manhattan Wednesday, Jan. 23, 2013. The temperature was around 12 degrees, but with wind gusts of 15-20 mph, it felt more like five below as people started their day in New York City. (AP Photo/Mark Lennihan)

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A cold snap has sent as waves of Arctic air swept south from Canada, pushing temperatures to dangerous lows and leaving parts of the Midwest and Northeast reeling.

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