If Russia invades Ukraine, it would be the largest and potentially deadliest military action in Europe since World War II.

So why is there so much division between the U.S. and its European allies over how seriously to take the threat?

Guest: Anton Troianovski, the Moscow bureau chief for The New York Times.

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Background reading: 

• Biden administration officials told lawmakers that a large-scale Russian invasion could kill as many as 50,000 civilians and prompt a refugee crisis in Europe.
• U.S. and European leaders say that they are “absolutely united.” But are they?

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