Team Sky on doping questions

Team Sky principal Sir David Brailsford and Tour de France leader Chris Froome talk about the doping questions the team have to answer.

Froome says he "can understand given the history of the sport" and Brailsford describes a "transitional period where people are going to be very, very low on trust and very, very high on questioning".

Victory on Sunday's climb up Mont Ventoux gave Froome his second mountain stage of this year's Tour and extended his race lead to over four minutes.

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