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Workers, photographed in 2016, at the Russian Anti-Doping Agency. An executive committee at the World Anti-Doping Agency is considering reinstating the Russian organization. Alexander Zemlianichenko/AP hide caption

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Alexander Zemlianichenko/AP

Short-track speedskater Viktor Ahn of Russia won a gold medal at the Winter Games in Sochi, Russia in 2014. Ahn and three former NHL players are among 32 Russian athletes who filed appeals against doping charges on Tuesday. David J. Phillip/AP hide caption

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David J. Phillip/AP

The World Anti-Doping Agency says it has acquired more than three years of testing data from the lab, in the building pictured here, which WADA says was the site of a state doping program of Russian athletes. Yuri Kadobnov/AFP/Getty Images hide caption

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Yuri Kadobnov/AFP/Getty Images

IAAF President Sebastian Coe, left, speaks with FIFA President Gianni Infantino at the opening of an Olympic Summit in Lausanne, Switzerland, Saturday. Olympic sports leaders are discussing how to improve a global anti-doping system amid the fallout of a Russian state-backed cheating scandal. Fabrice Coffrini/AP hide caption

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Fabrice Coffrini/AP

"WADA has been informed by law enforcement authorities that these attacks are originating out of Russia," says Olivier Niggli, the anti-doping agency's chief operating officer and general counsel. Adrian Dennis/AFP/Getty Images hide caption

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Adrian Dennis/AFP/Getty Images

Sports Minister George Hilton (top right) visits the Brazilian Doping Control Laboratory in Rio de Janeiro last month. The lab, which had been set to test samples from Olympic athletes in August, has been suspended by the World Anti-Doping Agency. Felipe Dana/AP hide caption

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Felipe Dana/AP

A man walks outside the building that houses Russia's antidoping agency (RUSADA) in Moscow Tuesday. The World Anti-Doping Agency (WADA) has suspended the accreditation for the Moscow anti-doping laboratory. Yuri Kadobnov/AFP/Getty Images hide caption

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Yuri Kadobnov/AFP/Getty Images