Out front next on the brink. Moscow warning the West. They are ready to retaliate as Ukraine launches more attacks inside Russia. And tonight, new details about Trump's plan to stop Putin's deadly invasion. Plus, Elon Musk putting government employees on notice, posting their names online, information about their jobs, as concerns mount about their

safety. And paging Dr. AI, a new study finding artificial intelligence did a better job

diagnosing medical conditions than doctors. Could AI upend the medical world? The doctor who led the

study is my guest. Let's go out front.

Good evening, I'm Erica Hill, in for Aaron Burnett. Outfront tonight, Putin's patience,

is running thin. The Russian president's foreign minister, Sergey Lavrov, making it clear Russia will not put up with the damaging long-range missile attacks from Ukraine for much longer.

We have many proverbs that reflect the character of our people.

Measure twice, cut once.

I remembered one more proverb which Western officials should bear in mind in this situation.

A Russian man takes a long time to get going.

I'm sure the viewer knows what happens next.

What is next? Putin has, of course, put the U.S. in a nuclear notice, and Moscow has wasting no time mass-producing nuclear shelters. Just take a listen to what they're saying now on state TV.

I would like to remind the Germans where this is going.

It will end with destroyed houses because the Russians never surrender,

and no one has ever defeated the Russians.

So if Germany were to be attacked, it would lead to another world war.

And according to the retired general that Donald Trump just tapped to be America's envoy to Ukraine, the U.S. and its allies are on the cusp

of a global assault. No, I don't think World War III has begun, but we're right on the

precipice. A simple spark and spin things right out of control. Now, General Keith Kellogg has been tasked with leading negotiations

to end the nearly three-year war. sources telling CNN, it's still too early to say just what

Team Trump's strategy is there, though Kellogg has argued Washington should only arm Ukraine on the

condition that Kiev enter peace talks with Russia. Meantime, Trump's pick for national security

...