The document profiles several celebrated athletes competing in the 2012 London Olympics, including: 1) Jelena Issinbajeva, a Russian pole vaulter and two-time Olympic gold medalist. 2) Usain Bolt, a Jamaican sprinter and world record holder in the 100m, 200m, and 4x100m relay who dreams of being the fastest man on Earth. 3) Michael Phelps, an American swimmer who owns 16 Olympic gold medals and started swimming at age 7.