New travel restrictions for international air travelers coming into the U.S. are set to begin in just hours, as officials try to slow the spread of the Omicron variant. All visitors must now show proof of a negative Covid test the day before boarding. Some travelers are canceling their flights altogether. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
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U.S. Travel Restrictions To Go Into Effect As Omicron Variant Spreads