This is GPS, the Global Public Square. Welcome to all of you in the United States and around the world.

I'm Farid Zakaria, coming to you live from New York.

Today on the program, after Friday's talks between the U.S. and Iran, is a new nuclear deal possible.

I'll talk to Wendy Sherman, who led the U.S. side of the negotiations that led to the last deal with Iran. Plus, the journalist Kim Gattis.

Then, Tuesday will mark four months since the ceasefire between Israel and Hamas began.

But all is not quiet on that Middle Eastern front.

More than 500 gauzens have been killed in that time, including at least 24 on Wednesday alone.

And a true peace seems very far away.

I'll talk to former CNN correspondent, Arwa Damon, about the state of play in Gaza today.

Finally, how will AI change our health, our lifespans, will the cure diseases previously

thought to be uncurable.

I'll bring you a great discussion with three key thinkers on this topic.

But first, here's my take.

We all sense that the world is entering a more uncertain phase.

Alliances feel shakier, trade is fragmenting, and great powers are jostling more openly.

But beneath these visible shifts lie something less discussed and more dangerous, the slow

collapse of nuclear stability. For much of the Cold War, people were terrified that a world with nuclear weapons would inevitably lead to proliferation

and that wars would end up nuclear.

After all, rarely in human history has a weapon sat unused in arsenals. But that is what happened. The arsenals remained,

but they were bound by treaties, habits, and doctrines about restraint. Arms control agreements

capped numbers. Deterance relationships were relatively clear. Proliferation was constrained, if imperfectly, by norms and pressure.

It was not a safe world, but it was a stable one.

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