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Stephen Sackur talks to the newsmakers and personalities from across the globe.

Cycling is one of the most physically demanding of professional sports. It is also one of the most tainted. In the last decade a host of top riders have been exposed as drugs cheats; HARDtalk's guest was one of them.

David Millar held the Tour de France yellow jersey and was a world champion before he was busted. Banned for two years he then came back, committed not just to racing but to cleaning up cycling. But is there room for integrity in a world where winning is everything?