Many athletes have been accused of doping to cheat in their sport. The latest to be hit with the scandal is seven-time Tour de France winner, Lance Armstrong.

During a segment of 60 Minutes Armstrong's former teammate, Tyler Hamilton, accused Armstrong of using performance -enhancing drugs to cheat in cycling races, including the Tour de France. The interview was broadcast on CBS Evening News on Thursday.

Hamilton said that Armstrong took a blood-booster called EPO in the 1999 Tour and before the races in 2000 and 2001. Armstrong won consecutively from 1999-2005.

I saw [EPO] in his refrigerator ... I saw him inject it more than one time, like we all did. Like I did, many, many times, Hamilton said. [Armstrong] took what we all took ... the majority of the peloton. There was EPO, testosterone, a blood transfusion.

According to a report by the Huffington Post, EPO is a drug that boosts endurance by increasing the number of red blood cells in the body.

Despite the accusation from Hamilton, Armstrong has always denied doping and he has never failed a drug test.

Approximately one year ago, another one of Armstrong's former teammates, Floyd Landis, accused the Tour de France winner of drug use.

Armstrong's lawyer, Mark Fabiani, dismissed the 60 Minutes interview.

Hamilton is actively seeking to make money by writing a book, and now he has completely changed the story he has always told before so that he could get himself on 60 Minutes and increase his chances with publishers, Fabiani said in a statement. But greed and hunger for publicity cannot change the facts: Lance Armstrong is the most tested athlete in the history of spots: He has passed nearly 500 tests over twenty years of competition.

Armstrong took to Twitter to dismiss the allegations as well. 20+ year career. 500 drug controls worldwide, in and out of competition. Never a failed test. I rest my case, he tweeted.

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