After years of fiercely denying the allegations against him, former cyclist Lance Armstrong has, for the first time, publicly admitted to doping. Armstrong ended a decade of speculation by admitting he used performance enhancing drugs to win every single one of his seven Tour de France titles. The former cyclist, who was stripped of his titles late last year, made the confession in an interview with US television host Oprah Winfrey. So, how much damage has been done to the world of cycling? And what's next for Lance Armstrong and the sport?