Former president, World Anti-Doping Agency - Dick Pound

Stephen Sackur speaks to Dick Pound, president of the World Anti-Doping Agency from 1999 to 2007 and veteran anti-doping campaigner. The world of international sport is in freefall following a long series of doping allegations. Has there been a failure in the national and international agencies that are supposed to prevent athletes using drugs? What can now be done about it and should all sporting success be treated with suspicion?