The nuclear umbrella has a few holes in it now a key treaty between Russia and the USA has expired. Some fear the end New START might trigger a nuclear weapons arms race between Trump and Putin. Could it also inspire the middle powers in Europe and Asia to follow suit? 

Kylie Morris and Latika Bourke (The Nightly) speak to former US State Department Official Joel Wit, who sat at the table for nuclear talks with North Korea and the Soviet Union, about why we shouldn't give up on non-proliferation, and where the US went wrong in their nuclear diplomacy.

Guest: Joel Wit, distinguished fellow at the Stimson Centre and author of Fallout: The Inside Story of America's Failure to Disarm North Korea.

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