Asked when he realized that doping was rife in cycling, Armstrong said his generation was no different than any others.
"The 'help' has evolved over the years but the fact remains that our sport is damn hard, the Tour was invented as a stunt, and very tough (riders) have competed for a century and all looked for advantages, from hopping on trains 100 years ago to EPO now," he said.
"No generation was exempt or 'clean.' Not Merckx's, not Hinault's, not LeMond's, not Coppi's, not Gimondi's, not Indurain's, not Anquetil's, not Bartali's, and not mine."
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