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.Have you lost a loved one during the pandemic? The Daily is working on a special episode memorializing those we have lost to the coronavirus. If you would like to share their name on the episode, please RECORD A VOICE MEMO and send it to us at thedaily@nytimes.com. You can find more information and specific instructions here.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?Want more from The Daily? For one big idea on the news each week from our team, subscribe to our newsletter. For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.