It was the story that shocked the world: Russian athletics was revealed to be corrupt from top to bottom, with institutionalised doping used to help the nation's athletes win medals they did not truly deserve. There had always been suspicions, but now WADA had the clearest evidence of what had gone on. As a result, Russia was banned from international athletics until they could show that they were competing clean. With the Rio Olympics imminent, it was a shattering blow to the country's prestige. At the heart of it all, however, was a very personal tale of a couple who had risked everything.

Author David Walsh joins us to discuss his new book about this extraordinary story.