You're listening to a download from the BBC, this is from our own correspondent.

You can hear the version of the program we make for the BBC World Service by visiting our site

at BBC online.

But here's the latest edition broadcast on BBC Radio 4 and introduced by Kate Adi.

What can an American filmmaker teach a bunch of Hungarian police cadets about tackling racial prejudice.

Also today, a privileged childhood surrounded by Allah's soldiers on Earth,

we hear what it's like growing up in an Egyptian military family.

Why passions are running high at the Big Bat petrol station

in South Dakota, and a dizzying mix of guns, glamour and gaudy real estate in the Niger Delta.

But first, one question has dominated recent headlines.

Were the Boston bombers so-called lone wolves, or were they fulfilling the orders of a terrorist organization?

So far Russia, America and even Islamic insurgents from the North Caucasus have suggested

that the suspects, Brothers Tamalan and Jocart Sanayev, acted on their own.

But how did a regional conflict in Russia end up linked to the murders of three people

watching a marathon nearly 6,000 miles away. This week US officials

flew to Dagestan a volatile mainly Muslim region of southern Russia to try to get

some answers. Steve Rosenberg was also in the

Dagestani capital Mahajkala conducting his own investigation.

When Tsar Nicholas the first was searching for somewhere to build a fortress on the eastern fringes of the Russian Empire,

it's little wonder he chose what became known as Machachkala.

For this town is blessed with such natural beauty it would catch the eye of any

emperor. To one side of the Caucasus mountains, their jagged peaks stabbing the sky like

...