On £15,000 carbon-fibre blades, the 'fastest man on no legs' beats most able-bodied sprinters. Next week in Sheffield Oscar Pistorius bids to go to the Olympics. But is it a fair contest?Racing: Oscar and his high-tech artificial legs in action"A loser is not the one who runs last in the race. It is the one who sits and watches and has never tried to run."It seems like a premonition. "Sheila did