Guardian News&Media

On December 26, 2004, when the tsunami broke across the shores of the Indian Ocean, killing at least 275,000 people in a dozen countries, my three small children and I were paddling in the sea in Mumbai. We all noticed an unusually high, strong riptide that morning, but it was not until we returned to the hotel that we learnt how lucky we had been.

The Olympic Isle on opening night in July was full of sweet noises and good intentions. But beneath the fantasy a sewer ran, diverted but untamed: the spectre of doping. And not just doping, because this is the age of genomics: gene doping.

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