The Chinese and the Olympic flag wave during the opening ceremony of the 2022 Winter Olympics in Beijing. The World Anti-Doping Agency cleared 23 Chinese swimmers of doping allegations despite positive tests for banned substances, allowing them to compete in the 2021 Tokyo Games. Petr David Josek/AP hide caption
Yufei Zhang of Team China competing during the Tokyo Olympics in 2021. Zhang won four medals in Tokyo including two gold and now is among 23 Chinese swimmers embroiled in a doping scandal. Tom Pennington/Getty Images hide caption
Russia's Kamila Valieva competes in the women's single skating event during the Beijing 2022 Winter Olympic Games at the Capital Indoor Stadium in Beijing on February 17, 2022. Manan Vatsyayana/AFP via Getty Images hide caption
Russian figure skater Kamila Valieva was allowed to compete in the women's short program at the Winter Olympics on Tuesday despite having failed a drug test. David J. Phillip/AP hide caption
Kamila Valieva of Team ROC skates during a training session at the Beijing Winter Olympic Games on February 13, 2022. Dean Mouhtaropoulos/Getty Images hide caption
Empty lanes are pictured ahead of a heat for a swimming event during the Tokyo 2020 Olympic Games at the Tokyo Aquatics Center. Attila Kisbenedek/AFP via Getty Images hide caption
Megan Rapinoe says she uses a variety of CBD products as part of the "all-natural recovery system" that has become part of her daily routine. Michael Wyke/AP hide caption
Russian National Anti-Doping Agency head Yuri Ganus speaks to reporters in Moscow in January. Pavel Golovkin/AP hide caption