Can Joe Biden persuade Putin to reverse the recent troop buildup on the Ukraine border? An exclusive interview with the Ukranian ambassador to the U.S. Plus: A look inside one of Libya’s detention centers, and how Puerto Rico is beating the odds to become the poster child for vaccination.

To learn more about how CNN protects listener privacy, visit cnn.com/privacy

Learn more about your ad choices. Visit podcastchoices.com/adchoices