Hello and welcome to the Intelligence on Economist Radio. I'm your host, Jason Palmer.

Every weekday, we provide a fresh perspective on the events shaping your world.

Where do people get their stock tips? Well, it depends on how old they are.

We take a look at the habits and trends among millennial investors,

how they're changing the day trading game, and what kinds of companies will be getting their attention.

And, seventh time lucky.

Tomorrow, a new airport in Berlin will launch after six planned grand openings.

It's nine years behind schedule.

Our correspondent goes along to a dress rehearsal of sorts

and explains that the airport's headaches aren't over yet.

But first... The world's oceans are under increasing pressure from fishing.

Just a fifth of the world's commercial species are sustainably caught.

But the legal, known end of the industry might literally be only the half of it.

20 to 50% of the global catch is illegal, or isn't reported, or is woefully unregulated.

That comes at an enormous cost, and not just to dwindling species.

It robs poor coastal states of billions in revenue,

and much of it wreaks havoc on underwater ecosystems. And the crews of all those ships

are subject to dangerous conditions, abuse, and worse. Much of the illegal trade is just coming to light, thanks to new ways of spotting it.

In particular, revelations about the vast number of what are called dark fleets.

Well, for a number of years, hundreds of rickety wooden fishing boats from North Korea

have washed up on Japanese shores.

And it's been a mystery because the big question is why these unseaworthy vessels

...