Tonight in Washington, D.C. the 32 members of the North Atlantic Treaty Organization

and allies from around the world are celebrating the Alliance's 75th anniversary.

NATO was born in the same room where President Biden spoke this evening, calling it

quote, the single greatest offensive alliance in the history of the world.

The focus of his remarks fell on the alliance's work to prop up a non-member Ukraine in its war to repel Russia.

We know Putin won't stop at Ukraine, but make no mistake.

Ukraine can and will stop Putin.

And Keeh, remember fellas and ladies,

supposed to fall in five days, remember?

It was still standing two and a half years later and will continue to stand.

The president concentrated his remarks on Ukraine,

but the president himself and his political future are also very much a part of

this summit, as is the possibility of a second Trump administration.

Here's Nick Schifrin.

While questions around President Biden and former President Trump loom over the summit, the primary

effort is Ukraine.

NATO members will announce they are sending new air defense systems one day after one of the worst attacks on Kyiv in years that

destroyed a children's hospital and killed more than 40.

NATO will offer what its leaders call a bridge to Ukraine's membership

including a new command based in Germany led by a

three-star general. NATO is taking over what has been a US-led effort to

coordinate weapons assistance. NATO will offer more training and financial assistance and diplomats tell me the document will

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