The Moscow terror attack could mark the beginning of an even more brutal phase in Russia’s war in Ukraine — even if Ukraine had nothing to do with it. It's also a sign that ISIS-K is making a global comeback. This episode was produced by Avishay Artsy and Haleema Shah, edited by Miranda Kennedy, fact-checked by Laura Bullard and Kim Eggleston, engineered by Patrick Boyd, and hosted by Noel King. Transcript at vox.com/todayexplained Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices