Welcome to the NewsHour. A thousand days ago, Russia launched its full-scale invasion of Ukraine.

And today, Ukraine marked that grim milestone with a first, using a long-range American missile system to hit a target inside Russia.

Also today, Russia released its updated nuclear doctrine that says it could use nuclear weapons if attacked by a conventionally

armed country supported by a nuclear power. All this as leaders of the G20 nations concluded a summit

in Rio de Janeiro. That is where Nick Schiffrin is covering President Biden's final gathering

and Ukraine's strike. Nick? Omna, Ukraine fired those long-range missiles known as attackums, the army tactical missile

system into the Russian region of Brijansk.

That is right next to the Kursk region, which Ukrainian soldiers seized this summer.

North Korean troops have recently joined Russian troops there in massing to try and recapture

Kursk from Ukraine.

The target of today's attackam strike is reportedly an ammunition depot.

In the coming days, expect strikes on similar targets, including logistics hubs and command

and control sites in order to protect those Ukrainian troops in Kursk and also make Russia pay a price for deploying

North Korean troops.

Now, Ukraine is certainly a topic here, the G20 in Rio, but many of the leaders here are

looking beyond President Biden, some to China, all to his successor.

In front of Rio's Sugarloaf Mountain, the world's most powerful leaders prepared for their

family photo.

Chinese President Xi Jinping was there.

The collected staff was there.

As were the Global South's three core leaders, Brazil, India, South Africa, next to the man

who calls himself their partner.

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