The U.S. Justice Department is joining a lawsuit against Lance Armstrong, filed by former teammate Floyd Landis, for using performance enhancing drugs during the Tour de France.
Among its claims: Landis saw Armstrong store and then re-inject his own blood to boost his performance, and Armstrong twice gave Landis banned hormones before races.
After denying for years that he cheated, Armstrong gave a general admission last month in an interview with Oprah Winfrey.
