Thanks for downloading this podcast from the BBC World Service.

I'm Tim Hewall, talking to a remarkable man who risked his life to tell the world what's

been happening in his native country, Syria, but never revealed his identity.

A man who wants us to see not just It's sunset, it's almost sunset.

You can see some blue sky getting purple and then the orange sun reflecting on the green around me.

I mean you could see my face is becoming orange and it's really really beautiful.

That's amazing I wish I was there.

The hell is hellen!

Oh, I'm not a religion, Raka, come to Raka.

Yes. Yes, Raka. The Syrian city most people know only as the short-lived world capital of terror,

seat of so-called Islamic states now vanquished caliphate.

Raka, the city, maybe you didn't know of many colours.

There's a picture here of brilliant green salad vegetables, lettices and huge curie-on-dives,

strewn in the thin oozy mud of a winter street. It looks quite big. and In this one an arc of shimmering droplets against a cobalt blue sky

as a father dunks his young son in the dark swirling waters of the river Euphrates.

And here an ISIS fighter in black woolly head mask and slate grey tunic, black and brown rifle trampling on a mountain of band, confiscated cigarette cartons or glistening white, the only bright thing

in the picture.

All those pictures and many more taken by the man sitting under the tree in the

sunset for years he used his camera to tell Raka's story in secret.

My pictures were shown on news outlets all over the world, but no one knew I'd taken them.

I always used a pseudonym, a nickname.

He's perhaps the only photojournalist to have worked under every

...