From our freinds at cracked.com - Highlights of the article
Cheat at the Paralympics? (which is like the Special Olympics, where people with disabilities compete). Who would stoop as low as that?
The short answer: the Spanish. In an act of desperation so pathetic it inspires pity, some of the players on the Spaniards' gold medal-winning Paralympic basketball team turned out not be disabled at all.
Yes, that South Park episode and that Johnny Knoxville movie both turned out to be based on a true story.
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Dude(?) Looks Like a Lady
Tamara Press, the eldest of the two sisters, was a leading figure in the shot put and discus from 1958 until she left the sport. Irina Press was a track and field expert. During their reign of dominance, the Press sisters won five Olympic gold medals, a single silver and several more medals in other competitions. They also set 26 world records.
People were already questioning the Press sisters, specifically whether or not they were really the Press brothers (yes, people actually started derisively calling them that). Theories ranged from the pair being hermaphrodites (though the rarity of that condition means the odds against both sisters having it are astronomical) to accusations they were injecting male hormones.
The sisters were never formally accused and lived the rest of their lives as heroes in Russia. Many people who support the Press sisters insist that their leaving the sport right when proof was demanded was just unfortunate timing. We'll let you be the judge.