AdvertisementAthletes Chased By Technology In The Sport Of Anti-Doping11:16Download AudioResumeMay 10, 2014NPR StafffacebookEmailLance Armstrong (left) and Tyler Hamilton compete in the 90th Tour de France in 2003. Hamilton later testified in the doping case brought against Armstrong and the U.S. Postal cycling team. (Franck Fife /AFP/Getty Images)
