Author Blaine Harden has studied the history of U.S. relations with North Korea extensively. In this episode, he shares why he's more concerned than ever before about the possibility of war. When asked how the U.S. can avoid further conflict, he says there are "no good, clear, swift solutions," and the U.S. is currently implementing the "least bad solution," which is to keep open lines of communication with North Korean diplomats.

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• ABOUT AMNA NAWAZ: Amna Nawaz is ABC News' digital anchor and an Emmy Award-winning journalist who has reported from across the U.S. and around the world. Amna launched "Uncomfortable" to tackle the issues that divide our country, and to better understand how we move past them.

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