The 17th stage of the Tour de France began this morning with no rider wearing the yellow jersey. Leader Michael Rasmussen was fired for lying to his team. Two other teams have already been excluded over doping accusations. The Tour is the world's most important cycling event, and its nation's greatest sporting institution. Today, the French Prime Minister said the sport has to be cleaned up and the influential national paper Liberation ran a story headlined "The Death of the Tour." Jeremy Whittle, who reports on cycling for the Times of London, reflects on the future of the Tour de France.