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By Sarah Dallof
(NBC News) A deep freeze is sweeping across much of the nation, bringing with it record cold.
In all, 25 states are affected by the arctic cold which is now sweeping into the Northeast and the normally mild Deep South.
Citing "flash freezing" JetBlue announced a stop to all flights out of Boston's Logan and all three major airports in the New York area, leaving tired passengers crowded terminals.
Officials are encouraging people to avoid going outside whenever possible.