Russia’s invasion of Ukraine reaches four-month mark, with no end in sight

Russia’s invasion of Ukraine started four months ago, but there is still no end in sight. We talk to Oleksandra Matviichuk, who has been documenting evidence of war crimes; and discuss what might come next with Serhii Plokhy, a professor of Ukrainian history at Harvard University; and David Marples, a distinguished university professor of Russian and East European history at the University of Alberta.