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The 'Blade Runner's' other set of legs

Double-amputee sprinter Oscar Pistorius picked up a silver medal in the men's 4x400-meter relay at the world championships in South Korea on Sept. 2, earning great acclaim and adding to the debate over whether his running blades offer him an advantage over able-bodied athletes.

Visiting London to promote next year's Paralympic Games, Pistorius called an abrupt end to an interview with BBC Radio on Tuesday after rejecting a suggestion he could be considered "an inconvenient embarrassment to the South African authorities and IAAF". Listen to the interview.