The omnium is a six-part track cycling competition that demands speed, strength and endurance. For women's juniors the events range from a 500-meter time trial and a 10-km points race to a 2,000m individual pursuit. For Kirsten Williams, who won the 17--18 age group omnium at USA Cycling's junior track nationals in Carson, Calif., in June, the event also required a lot of heart. Seventeen days earlier her father Victor, 51, was killed after a collision with another cyclist at the Olympic Training Center Velodrome's weekly summer race series in Colorado Springs. Kirsten, who trained alongside her father and was on the track when the crash occurred, said her title, which earned her a trip to the junior worlds in Seoul last week, was for her dad. "I wanted to honor him and have his legacy of strength and tenacity live on," she said.