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On GPS: Russian athletes under investigation
Fareed Zakaria, GPS
President Putin responds to allegations of Russian athletes doping on a massive scale.
01:41 - Source: CNN
Athletes and doping 15 videos
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On GPS: Russian athletes under investigation
01:41
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Olympic ban on Russian track team upheld
02:41
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IAAF official: Russian officials ignoring doping rules
01:02
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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?
01:18
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Peyton Manning denies doping allegations
02:41
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5 infamous sports doping scandals
02:17
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The evolution of doping in sport
02:19
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CNN Explains: Performance-enhancing drugs
02:28
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CNN visits secretive Russian lab
02:40
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Report: Ban Russia from athletics for doping
01:32
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WADA to consider banning countries for doping offenses
02:27
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Report: Doping still widespread in cycling
03:03
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Canadian sprinter Ben Johnson sets a world record in the 100 metres final at the 1988 Summer Olympics in Seoul, 24th September 1988. (Photo by Tony Duffy/Getty Images)
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Disgraced sprinter now fights doping
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A history of doping exposed
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Sports doping scandal rocks Australia
01:55
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