Choosing what to watch night after night the flicking through the endless

searching is a nightmare we want to help you on our brand new podcast off the

telly we share what we've been watching

Cladie Aide.

Load to games, loads of fun, loads of screaming.

Lovely. Off the telly with me Joanna Paige.

And me, Natalie Cassidy, so your evenings can be a little less

searching and a lot more auction listen on BBC sounds. Hello and welcome to the Witness History Podcast here on the BBC World Service.

I'm Louise Adaggo.

After its independence in 1991, Kazakhstan had to deal with the legacy of being

one of the centres of the former Soviet Union's huge nuclear weapons program. There were

particular concerns about the safety of the

Soviet's main nuclear testing site at semi-planotinsk in northeast Kazakhstan.

This concern led to a secret operation

story never told.

and Russian scientists to make the site secure. The operation's been called the greatest nuclear nonproliferation story, never told.

And in 2016 I spoke to one of the scientists at the heart of it, Dr Siegfried Hecker, former

head of America's Nuclear Weapons Laboratory.

Los Alamos.

For Siegfried Hecker, the Soviet Union's collapse was not a surprise, but it was a challenge, one of the biggest of his lifetime.

This was uncharted territory. Something like this had never happened. You know,

we're a world power with the ability to destroy the entire world just collapsed.

...