 Two former Olympic gold medalists say they've lost faith in the ability of the World Anti-Doping Agency to rid their sports of cheaters. Swimmers Michael Phelps and Alison Schmidt told a House panel that the Games may unravel if sports doping is allowed to continue. Their remarks come less than a month before the Paris Games. And after the agency acknowledged some Chinese swimmers tested positive for doping, but kept the results secret and competed in the 2021 Tokyo Games.