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Jake Cote, a carrier with the United States Postal Service, delivers mail along Sunset Avenue, Feb. 11, 2016, in Utica, N.Y. (Photo by Mark DiOrio/Observer-Dispatch/AP)

Polar vortex brings brutal cold for millions

A polar vortex of brutally cold air sent temperatures plummeting to "life-threatening" lows across the Midwest and Northeast Saturday, with millions of Americans warned of dangers including frostbite.The coldest air mass of the winter brought the thermometer down to minus-6 degrees overnight in Minneapolis, while New Yorkers were urged...

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