Media playback is unsupported on your device

Getty Images

Video

Floral Maxi Size Green Summer Plus AELSON Button Boho Long Dress Dresses up Beach Women's Split U0qFTw1

When a Russian dissident was poisoned in London with a highly radioactive substance, the UK government accused the Kremlin of his murder.

Green Plus Dresses Button Boho Women's Dress Maxi up Size AELSON Split Long Beach Summer Floral Alexander Litvinenko had been a colonel in the Russian security services, but claimed the Putin government was corrupt.

In November 2006 he suffered an excruciating death after he was poisoned with Polonium 210. His wife Marina was at his bedside.

Witness: The stories of our times told by the people who were there.

  • 25 Nov 2017
Go to next video: The dog that orbited the Earth