Updated: Saturday, 20 Oct 2012 11:52 Lance Armstrong spoke out in response to the USADA report Lance Armstrong admitted he had experienced "a difficult couple of weeks" as he made his first public appearance since the publication of the scathing United States Anti-Doping Agency's report. USADA last week published a 1,000-page report which concluded the Texan and his United States Postal Service team ran "the most sophisticated, professionalised and successful doping programme that sport has ever seen". Armstrong announced he would not contest charges handed down by USADA in August. USADA promptly stripped the 41-year-old of all results since August 1, 1998, including his record run of seven Tour de France triumphs from 1999 to 2005, and banned him for life. USADA sent the UCI