Lance Armstrong: Usada report reveals doping evidence
11 October 2012 Last updated at 04:31 BST
Cycling legend Lance Armstrong's team ran "the most sophisticated, professionalised and successful doping programme the sport has ever seen", according to a report by the United States Anti-Doping Agency.
In its report, Usada said Armstrong, 41, "engaged in serial cheating" associated with doping.
The report contains testimony from 11 of his ex-US Postal Service teammates.
Zoe Conway reports from Washington.