How real is the threat of nuclear war?

NATO member states have been clear they will not directly intervene in the Russian invasion of Ukraine. But many Ukrainians are calling on the West to do more. Apple News Today host Duarte Geraldino talks with Ukrainian activist Daria Kaleniuk, who is urging NATO allies to declare a no-fly zone over Ukraine. In response, cohost Shumita Basu speaks with Vox senior correspondent Zack Beauchamp, who says any type of military intervention by the West would be catastrophic and could trigger a nuclear attack from Russia.