First broadcast: on BBC NewsLatest broadcast: on BBC News Channel HD
Stephen Sackur talks to David Howman, director general of the World Anti-Doping Agency, and asks why it is proving so hard to root drugs out of sport. Show more
First broadcast: on BBC News Middle EastLatest broadcast: on BBC News North America
Stephen Sackur talks to David Howman, Director General of the World Anti-Doping Agency - and asks why is it proving so hard to root drugs out of sport? Show more