The nation’s murder rate rose by almost 25 percent last year — the largest increase in at least 60 years. This year might be even worse. ProPublica’s Alec MacGillis reports on “The Great Regression.” 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