german doping secrets testing_00004717.jpg
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A history of doping exposed
CNN's Fred Pleitgen exposes a history of doping throughout the cold war.
02:40 - Source: CNN
Athletes and doping 15 videos
german doping secrets testing_00004717.jpg
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A history of doping exposed
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Olympic ban on Russian track team upheld
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On GPS: Russian athletes under investigation
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IAAF official: Russian officials ignoring doping rules
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LONDON - JUNE 27: Maria Sharapova of Russia serves against Nathalie Dechy of France during the seventh day of the Wimbledon Lawn Tennis Championship on June 27, 2005 at the All England Lawn Tennis and Croquet Club in London. (Photo by Mike Hewitt/Getty Images)
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Is Maria Sharapova's failed drug test career ending?
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Peyton Manning denies doping allegations
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5 infamous sports doping scandals
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The evolution of doping in sport
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CNN Explains: Performance-enhancing drugs
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CNN visits secretive Russian lab
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Report: Ban Russia from athletics for doping
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WADA to consider banning countries for doping offenses
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Report: Doping still widespread in cycling
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Disgraced sprinter now fights doping
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Sports doping scandal rocks Australia
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