Warning: this episode contains descriptions of violence.

More than a hundred people died and scores more were wounded on Friday night in a terrorist attack on a concert hall near Moscow — the deadliest such attack in Russia in decades.

Anton Troianovski, the Moscow bureau chief for The Times, discusses the uncomfortable question the assault raises for Russia’s president, Vladimir V. Putin: Has his focus on the war in Ukraine left his country more vulnerable to other threats?

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

Background reading:

In Russia, fingers point anywhere but at ISIS for the concert hall attack.
The attack shatters Mr. Putin’s security promise to Russians.

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