China's Xue Chen (R) waits while teammate Zhang Xi serves at Centre Court of the stadium in Horse Guards Parade during their women's beach volleyball preliminary phase - Pool B match of the London 2012 Olympic Games against China's Xue Chen and Zhang Xi, on July 28, 2012 .Vasina-Vozakova won 18-21, 21-14, 16-14. AFP PHOTO / DANIEL GARCIA
North Korea's Chun Hwa Ryang competes on the women 48Kg Group A weightlifting competition at the London 2012 Olympic Games July 28, 2012. REUTERS/Adrees Latif (BRITAIN - Tags: SPORT OLYMPICS SPORT WEIGHTLIFTING)
Kazakhstan's Alexandr Vinokurov stands with his gold medal along with silver medalist Rigoberto Uran of Colombia and bronze medalist Alexander Kristoff of Norway after the victory ceremony for the men's cycling road race at the London 2012 Olympic Games July 28, 2012. (BRITAIN - Tags: SPORT OLYMPICS SPORT CYCLING)