Armstrong to ride with Astana

Lance Armstrong is chasing an eighth Tour de France title and an elusive feat: persuading everyone he's clean.

As the cycling champion reunites with his close friend and Astana team director Johan Bruyneel, the man behind his yellow jerseys, he's also adding a new member to his support group. Anti-doping expert Don Catlin has been hired to test Armstrong anytime, anywhere -- and to post the results online for the world to see.

"I think it's the first time an athlete can actually be totally validated on the chance he's successful," Armstrong said Wednesday. "In my opinion, Don Catlin is beyond reproach."

Armstrong revealed details of his comeback two weeks after saying he would end a three-year retirement. He'll ride for Astana and will compete in the Tour Down Under in Adelaide, Australia, in January.

The setting was the Clinton Global Initiative, the annual New York meeting of former President Bill Clinton's foundation. Armstrong, 37, held a news conference to talk cycling after announcing a new worldwide campaign to fight cancer before an audience of political and corporate leaders.

AMERICAN WINS WOMEN'S TIME TRIAL: American cyclist Amber Neben rode to victory in the women's time trial at the world championships in Varese, Italy, using her disappointing Olympics as motivation to surprise a field that included Beijing Olympics gold medalist Kristin Armstrong.

Neben, 33, was not even picked to ride the individual race against the clock at Beijing and put the effort of a whole season into the 13.76-mile ride through the sun-dappled hills surrounding the lakeside resort of Varese, finishing in 33 minutes, 51.35 seconds.

"I was just hoping that David would slay Goliath today," she said.