Joanna Keane

One example, in 2024, it said it had identified lighthouses hidden on the ocean floor.

that could apparently guide foreign submarines and preset the field for battle.

That's right.

Well, in 2023, we had British intelligence saying Russia was using trained dolphins.

That was at Sevastopol Naval Base in southern Crimea.

They were apparently put in floating pens used to retrieve objects and deter enemy divers.

We also had a beluga whale in 2019 caught the attention in Norway because it was wearing a harness.

Was it a Russian spy or not?

Listen now.

Players get six chances to guess a random five-letter word.

Now, if they get a green tile, it means you've got the right letter in the right place.

A yellow tile means right letter, wrong place.

So to give you an example, the word clear, OK?

You might get a yellow for the A and the R. So you've got to think of a different place to put those.

So your second guess could be a door.

This time, the R is green, so it's in the right place.

But you've got an A, D, O, a yellow.

So you've got to keep guessing.

Well, NBC have been quite clever here because this game is much loved.

Massive surge in popularity.