From a very young age, Corben Sharrah was obsessed with bike racing. He would create dirt tracks next to his house and impress neighborhood kids with his tricks and skills. He set goals, including turning pro, landing a sponsorship and standing atop the Olympic podium. "If he sets a goal, it is going to happen," said coach Greg Romero.

    Now, he's almost there. Despite breaking his femur last year, Sharrah has rehabbed and sits on the short list to make the U.S. Olympic team in BMX racing.

    It's been a fast ascent from nascent pro to London hopeful, but that's the only speed he knows. Alyssa Roenigk » Sharrah's path Video