How did such a hopeful moment in history slip through our fingers? That’s the subject of the book New Cold Wars: China’s Rise, Russia’s Invasion, and America’s Struggle to Defend the West, by David E. Sanger. Sanger is the White House and National Security Correspondent for The New York Times, where he has worked as a reporter for more than four decades. He joins us to talk about his book and how the world ended up where it is today.