The sporting world has been tainted by the constant drip of doping allegations, bribery and corruption - does it need a 'Mr. Clean' to fix it? Hardtalk speaks to Sebastian Coe – former British Olympic champion. He set 12 world records during his athletics career on the track and went on to hold many roles in various sporting organisations. Now he wants to become the president of the International Association of Athletics Federations, the IAAF. What more can be done to help clean up sport?(Photo: Lord Sebastian Coe addresses the media as he unveils his IAAF presidential campaign manifesto. Credit: Andrew Redington/Getty Images)

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