US-Russia nuclear treaty called START expired. Should we be worried?

For the first time in over half a century, there are no nuclear arms controls in place between the world’s two largest nuclear powers, the US and Russia. With a rising China growing its nuclear arsenal while it continues to assert its power on the international stage, we ask, is this the beginning of a new Cold War era? Ankit Panda, a senior fellow with the Carnegie Endowment for International Peace, joins The Excerpt to dig into the critical geopolitical, economic and military concerns at the heart of this story.

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