Krasivanova Twig

If it walks out of the door of NATO, there's a question mark over the whole organisation and wider security in Europe.

And we have heard, as we were hearing there from Jonathan Beale, real impatience from the U.S.

president over Ukraine and even questioning whether Europeans can be relied on as allies.

Don't give up on us, Mark Rutter was saying today.

We will do more for our own defense, just like you asked us to.

But finally, he was also speaking to Moscow.

Don't even think of invading a NATO nation, he said, because we will be armed and we will be ready.

But just last week, we heard from President Putin, who said he'd be ready for a war of Europe if it comes to it.

Now, of course, you can dismiss this as saber-rattling from Moscow or bombastic language from NATO.

But on the ground, the temperature and the tensions really are rising.

Our Europe editor, Katja Adler.

Now for more on one of today's big stories, you can go on YouTube and search for BBC News.

Then click on the logo and then choose Podcasts and Global News Podcast.

There's a new story available every weekday.

Next, many football fans have reacted with anger at the cost of tickets for next year's men's World Cup finals.

The prices for specific games were revealed by the sport's global governing body, FIFA.

The fan group Football Supporters Europe called them extortionate and called on FIFA to review them.

So, how much are they and how do you get them?

Manny Jasmy from BBC Sports spoke to Alex Ritson.

Well, this is the third phase of ticket sales, but the first in which fans know who's playing whom.