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What's the U.S. plan on Russia's "all out" invasion? Plus, a look at the strategy for fighting ISIS.
(CNN) – More than 8,000 flights have been canceled over the past 36 hours, affecting more than a million airline passengers.
The winter weather took a big bite out of schedules at airports in Charlotte, North Carolina, Philadelphia and the New York and Washington metro areas, and was still having a big impact in Atlanta, where the storm tapered off Thursday morning.
CNN's Sunlen Serfaty reports.