Sarah Hammer
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London Olympics: Cycling

Sarah Hammer of the United States competes during the omnium 500m time trials. (Leon Neal / AFP / Getty Images)
Sarah Hammer of the U.S., right, Annette Edmondson of Australia, center, and Laura Trott of Britain compete in the women’s omnium. (Ian Langsdon / EPA)
Sarah Hammer of the United States won the silver medal in the women’s omnium. This is the first Olympics for the omnium, an event that blends six endurance and sprint races over two days.  (Harry How / Getty Images)
Great Britain’s Chris Hoy crosses the finish line to win the gold medal in the men’s keirin cycling event. (Leon Neal / AFP / Getty Images)
Chris Hoy, left, of Great Britain celebrates his victory in front of Maximilian Levy, center, of Germany and Simon Van Velthooven of New Zealand. (Christophe Karaba / EPA)
Sir Chris Hoy of Great Britain, right, cries during the medal ceremony for the men’s keirin track cycling. Hoy has won more gold medals than any other British Olympian.  (Pascal Le Segretain / Getty Images)