Olympic quest hits moment of truth

For everyone from world and Olympic champions to unheralded newcomers, stars who served doping bans and rivals making comebacks from injury or retiring, the moment of truth has arrived in American athletics.

The 2012 US Olympic trials begin a 10-day run at Eugene's Hayward Field on Friday, although two rest days are set in the middle of the event and hammer throwers will stage their competition a day earlier at Nike's headquarters.

"I feel confident. I'm more than ready for our 'first' Olympics," said Sanya Richards-Ross, the 2012 world leader in the women's 200m and 400m.