First broadcast February 2007
The mysterious death in London of the Russian dissident Alexander Litvinenko was a story which could have come from the pages of a dramatic spy novel. But it actually happened, and has still not been fully explained.
This two-part series examines the work of scientists - acting as nuclear detectives - seeking to identify and control the spread of radioactive materials.
Part One: Theft and Smuggling
Given that just one nuclear device in the wrong hands would cause untold devastation and loss of life, keeping track of nuclear material is a top priority.
Where do radioactive materials come from? And how do these become available to the "wrong hands"?
This first programme examines theft, smuggling and what happens next.
Terms of Use
The BBC Podcasts are for your personal non-commercial use only.
All title, ownership rights and intellectual property rights in and to the BBC Podcasts shall remain the property of the BBC or third parties.
You may not edit, alter, adapt or add to the BBC Podcast in any way.
The BBC Podcasts are made available by the BBC on an "as is" and "as available" basis and the BBC gives no warranty of any kind in relation to the BBC Podcast.
To the maximum extent permitted by law the BBC will not be liable for any loss or damage which you may suffer as a result of or connected to the download or use of the BBC Podcasts
See the full BBC Podcast: Standard Licence Terms here.