Summary: We break down the key storylines behind Chris Froome's doping test from the Vuelta. He went over the limit for Salbutamol. Now, Froome and Sky have a chance to explain themselves, but a pall of doubt has been cast over his four Tour wins and that Vuelta victory. We speak with Andrew Hood who has insider knowledge from an anti-doping expert and a lawyer. This is cycling's biggest story in years — stay tuned as new developments come to light. Want to win a smart trainer? Enter Bkool's winter VeloNews giveaway. Everyone who signs up gets three free months of the Bkool online simulator! Go to: http://www.bkool.com/partners/velonews
