Monday, January 6, 2014

Polar Vortex hits U.S. with dangerously low temperatures

A cyclone of arctic air known as a polar vortex stretched from the Dakotas to the deep South, bringing wind chill warnings on the heels of near-blizzard conditions in some regions. Several Midwest states shut schools and urged everyone to stay inside, while airlines canceled thousands of flights. Gwen Ifill reports.


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