Ethiopian long-distance runner Kenenisa Bekele holds the world record and Olympic record in both the 5000-meter and 10,000-meter events. The 29-year-old runner has won three Olympic gold medals and five world championship titles.
Nastia Liukin, 22, USA: '08 Olympic all-around champion. She's also won four all-around national titles, as well as 9 world championship medals. Both of her parents have won world championships in gymnastics.
Mariel Zagunis has won every award there is to win in fencing. She's a 2-time Olympic gold medalist and a 2-time world championship gold medalist in sabre fencing. She's an NCAA champion, a Cadet World champion and a Senior World Cup champion.