The BBC News programme where you set the agenda.
Play now 25 mins
"The most sophisticated, professionalised and successful doping programme that sport has ever seen."
That's the United States Anti-Doping Agency's verdict on the sport's biggest name, Lance Armstrong - in a report that accuses him of using banned substances, trafficking drugs, administering drugs to team-mates and aiding and abetting a massive cover-up between 1998 and 2005. This was the period when he dominated the world's most famous race, the Tour de France. Armstrong has always denied the accusations but he has not contested Usada's charge.
Has this changed your opinion of him and what he did for cycling?
(Image: Lance Armstrong. Credit: JAVIER SORIANO/AFP/Getty Images)