What does the change in Russia’s nuclear policy mean for global security?

President Vladimir Putin has updated Russia’s nuclear doctrine.
Now, if a non-nuclear state – with the aid of a nuclear power – threatens the country’s sovereignty, it will be considered a joint threat, and Russia can respond with atomic weapons.
So what’s behind Putin’s decision? How will it impact the fighting in Ukraine? And how will the West respond?
Presenter: Neave Barker
Guests:
Pavel Felgenhauer – Russian defence and military analyst
Colin Clarke – research director at The Soufan Group, a global intelligence and security consultancy
Marina Miron – postdoctoral researcher in the War Studies Department at King’s College London