Why we must think about extremism differently to reduce it

As Sri Lanka reels from a series of deadly Easter Sunday attacks, the problem of violent extremism enters the spotlight once again. How can the U.S. and the world anticipate and counter the threat of terrorism, which experts agree cannot be addressed by military means alone? Amna Nawaz talks to former diplomat Farah Pandith, whose new book “How We Win” outlines a strategy for keeping us safe.