Britain's Chris Froome gestures to a teammate (right) after getting up from his third crash in two days. Froome, who hurt his wrist in Tuesday's fall, has abandoned the race that he won in 2013. Laurent Cipriani/AP hide caption

itoggle caption Laurent Cipriani/AP

The women of the Afghan National Cycling Federation team train outside Kabul, the capital. They face poor road conditions, terrible traffic, lots of gawking and even threats of violence in pursuit of their sport. Peter Breslow/NPR hide caption

itoggle caption Peter Breslow/NPR

Cyclists negotiate rush hour traffic in central London on Nov. 15. Fourteen London cyclists have died so far this year, all in accidents involving heavy goods vehicles. Oli Scarff/Getty Images hide caption

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The head of the World Anti-Doping Agency calls Lance Armstrong's lifetime ban "done and dusted." Armstrong is seen here riding in an event in Iowa this year. Matthew Stockman/Getty Images hide caption

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The incoming president of the International Cycling Union, Brian Cookson (right), shakes hands earlier this month with Pat McQuaid, the incumbent he defeated. Fabrice Coffrini/AFP/Getty Images hide caption

itoggle caption Fabrice Coffrini/AFP/Getty Images

American cyclist Chris Horner celebrates winning Spain's Vuelta bicycle race Sunday. Anti-doping officials say that Horner, who at 41 is the oldest ever to win one of cycling's top events, was not at the hotel drug testers visited. Jaime Reina/AFP/Getty Images hide caption

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British cyclist Graeme Obree, 48, celebrates setting the land speed record for prone cycling at the International Human Powered Vehicle track near Battle Mountain, Nevada. AFP/AFP/Getty Images hide caption

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Race leader Chris Froome of Great Britain finishes Stage 20 of the 2013 Tour de France. The penultimate stage of the Tour put Froome ahead by 5 minutes and practically guarantees he finishes Sunday in Paris in the yellow jersey. John Berry/Getty Images hide caption

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Riders and bicycles were spread across the road after one of the crashes Saturday during Stage 1 of the Tour de France, which began in Corsica. Joel Saget/pool /EPA/LANDOV hide caption

itoggle caption Joel Saget/pool /EPA/LANDOV

The 2013 Tour de France is breaking with several traditions, as it starts with a sprint stage on Corsica Saturday. Here, American Tejay van Garderen, 24, second from left, trains with his team on the island. Laurent Cipriani/AP hide caption

itoggle caption Laurent Cipriani/AP

Lance Armstrong warms up for the swimming leg of the 2011 Xterra World Championship triathlon in Kapalua, Hawaii (before he was banned from most competitions). This weekend, he'll swim in a Texas meet for masters swimmers. Hugh Gentry /Reuters /Landov hide caption

itoggle caption Hugh Gentry /Reuters /Landov