In year three of Russia's full-scale invasion of Ukraine, Kyiv has, over the last week,

flipped the script on Moscow with an audacious incursion into southern Russia,

catching Moscow by surprise and sewing chaos.

Today Ukraine said it had blasted its way deeper into the Kursk region of Russia

where it has captured dozens of towns and settlements and taken Russians prisoner and the governor of the

neighboring Belgrade region declared a state of emergency. It is the largest

cross-border attack since Russia's full-scale invasion

and the largest presence of foreign troops

in Russia since World War II.

Here's Nick Schifron.

For nearly two and a half years,

Ukraine has struggled on defense. Today, it's on offense.

For the past week Ukrainian soldiers have thrown aside Russian President Vladimir Putin's

claim the war wouldn't touch Russia.

They've trampled through more than 70 Russian villages, raising Ukrainian flags

over small town administrative buildings and changing Russian spellings into Ukrainian.

The incursion has reached about 18 miles into Russia.

What Ukraine says is about 390 square miles.

while soldiers show off their operation with video selfies,

plane and driving heavy metal.

They advanced the territory thinly defended.

But there's been a fight. They advanced the territory thinly defended.

...