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.

Today a top class education respectable and laid back, but is the four nationals man on the French border hiding sharpened teeth?

In Afghanistan, those in the Taliban's former stronghold are calling for more power.

We hear how the guns may have been silenced in Sri Lanka, but violence is still

in evidence, especially on the playing fields, and how screeching witches and letting it all shake a part of an artistic flowering in Tunisia.

It was once a more obscure profession, but thanks to those American TV shows and a few from this side of the Atlantic

forensic science has become a hot subject for students.

Essential to criminal investigation it helps in archaeological digs too.

Take the case of Richard III's remains under that car park in Leicester.

In El Salvador, though, which has one of the highest murder rates in the world

and a low conviction rate, forensic

scientists are thin on the ground.

Will Grant went to meet the man known simply as the engineer.

It had taken a few furtive phone calls, but eventually we agreed to meet high

up on a mountainside. I had wanted to see the latest site he was working on and interview him at

the crime scene, but his bosses weren't having that.

I've been told off for talking to the media recently he explained his voice a horse

whisper down the line I can talk to you but solely in a personal capacity.

A couple of nights later, we drove up the snaking mountain roads to Hualuwa, a small town outside

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