Deep freeze stretches across the U.S.
A deadly blast of arctic air shattered decades-old temperature records as it enveloped the eastern United States on Tuesday, snarling air, road and rail travel, driving energy prices higher and overwhelming shelters for homeless people.
At least nine deaths have been reported across the country connected with the polar air mass that swept over North America during the past few days. Authorities have put about half of the United States under a wind chill warning or cold weather advisory. (AP)
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