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International Paralympic Day in Trafalgar Square

LONDON, ENGLAND - SEPTEMBER 8: Oscar Pistorius shows off his skills as Chairman of LOCOG Lord Coe and Ellie Simmonds look on during the International Paralympic Day at Trafalgar Square on September 8, 2011 in London, England. The day marks the start of Paralympic tickets going on sale on September 9, 2011. (Photo by Jan Kruger/Getty Images)

Double-amputee Oscar Pistorius in action

A source of controversy, inspiration and fascination, Oscar Pistorius' green-light to run in the Olympics has suddenly made for one of the biggest stories to watch in London. -- Jason Owens