This is Intelligence Matters with former acting director of the CIA, Michael Morrell.

Brought to you by Lockheed Martin.

Your mission is ours.

Between the United States and Russia, we have still over 90% of the world's nuclear weapons.

There's between 13,000 and 14,000 nuclear weapons in the world.

Most of them are owned by the United States and Russia.

And so we have a unique responsibility to manage those weapons, to lead the world in terms of non-proliferation,

and to make sure that they're not used.

The nuclear deal with Iran was a really groundbreaking achievement that enhanced the security of Americans

and indeed the world, and the question is whether and how to re-enter that agreement under a Biden administration.

What they've done is basically because the US withdrew, they've backed off and stopped implementing

some of their commitments under the deal, but they've not, today, they've still let the IAEA continue

verifying, which is very important.

Do you see any possible path to a deal with North Korea that would either eliminate their nuclear weapons program

or cap it in a significant way?

We're going to have to start from the ground up.

I'll also add, of course, our relationship with China is very strained and complicated.

China's a key factor in reaching agreement with North Korea on freezing and, hopefully, ultimately eliminating its nuclear capability.

If anything has got a chance of solving the world's problems, its science and technology,

and every breakthrough was the result of somebody doing the breaking through, I'm David Poe.

This is Unsung Science, the untold creation stories behind the most mind-blowing advances in science and tech,

presented by CBS News and Simon & Schuster.

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