Tensions are very clearly escalating on the Korean Peninsula, with the North making unrelenting progress on their nuclear and ballistic missile programs, and the United States president now overtly threatening a new war.    In the meantime, the United Nations Security Council, which of course includes China, the United States and Russia, passed a new round of sanctions on North Korea intended to force Pyongyang back to the negotiating table -- but as of yet it is unclear if these new sanction will succeed in that regard.    So what are the policy options right now? And if North Korea does succeed in developing the capacity to reliably hit the United States with a nuclear weapon can it even be deterred from doing so? What would happen if the United States strikes North Korea first? What diplomatic paths are still open right now? On the line to discuss these questions and more is Dr. Jim Walsh of MIT. He discusses the current situation and why deterrence might be the least bad option we face.    Become a premium subscriber to unlock bonus episodes, earn other rewards, and support the show!