Catching the crooks
A syringe and small sample bottles at the laboratory.
Seven competitors were caught for using banned substances at the 2000 Sydney Olympics, though none was implicated in blood doping.
Experts are confident that blood doping will not help athletes to glory at Athens.
"If you cheat, you will be caught," Dick Pound, chairman of the World Anti-Doping Agency (WADA) said.
"All ways of enhancing the performance capability by increasing the number of red blood cells are well covered by anti-doping laboratories," said Swede Arne Ljungqvist, who heads the IOC's medical commission.
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