Akte BMX

dapdPhotographers cover a BMX cycling womens semifinal run at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. Former world champion Mariana Pajon has won the womens BMX competition at the London Olympics, giving Colombia its first gold of the

REUTERSLatvias Rihards Veide (L) and Edzus Treimanis crash during the mens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Paul Hanna (BRITAIN - Tags: SPORT CYCLING SPORT OLYMPICS)

dapdCyclists compete in a BMX cycling womens semifinal run during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. (Foto:Christophe Ena/AP/dapd)

REUTERSBritish Prime Minister David Cameron, British football player David Beckham and Beckhams sons Brooklyn, Cruz and Romeo (centre row, L-R) watch the BMX cycling event during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10

REUTERSAn official speaks to Frances Quentin Caleyron after he crashed during the mens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Paul Hanna (BRITAIN - Tags: SPORT CYCLING SPOR

dapda BMX cycling mens semifinal run at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (Foto:Sergey Ponomarev/AP/dapd)

dapdRaymon van der Biezen, of the Netherlands, leads Britains Liam Phillips in a run of the mens BMX cycling event at the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (Foto:Sergey Ponomarev/AP/dapd)

REUTERSAustralias Khalen Young wheels his bicycle to the top of a hill during the mens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Paul Hanna (BRITAIN - Tags: SPORT CYCLING SPORT

REUTERSCyclists compete in the mens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Cathal McNaughton (BRITAIN - Tags: SPORT CYCLING SPORT OLYMPICS)

dapdUnited States Brooke Crain (32) passes Alise Post, also of the U.S., who crashed in a BMX cycling womens semifinal run during the 2012 Summer Olympics in London, Friday, Aug. 10, 2012. (Foto:Christophe Ena/AP/dapd)

REUTERSBritains Shanaze Reade, Australias Caroline Buchanan, Latvias Sandra Aleksejeva, Australias Lauren Reynolds, Alise Post of the U.S. and other athletes compete in the womens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in

dapdLatvias Edzus Treimanis (127) and Latvias Rihards Veide (84) avoid a crash by United States Connor Fields (11) in a BMX cycling mens semifinal run during the 2012 Summer Olympics, Friday, Aug. 10, 2012, in London. (Foto:Matt Rourke/AP/dapd)

REUTERSCyclists compete in the mens BMX semi-final run during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Paul Hanna (BRITAIN - Tags: SPORT CYCLING SPORT OLYMPICS)

REUTERSLatvias Maris Strombergs bows after winning the mens BMX event during the London 2012 Olympic Games at the BMX Track in the Olympic Park August 10, 2012. REUTERS/Stefano Rellandini (BRITAIN - Tags: SPORT CYCLING OLYMPICS TPX IMAGES OF