Ben Johnson
Ben Johnson's world record-setting sprint at the 1988 Seoul Games was one of the most stunning races in Summer Olympics history. But Johnson wouldn’t go down in the record books for his lightning-quick performance or for defeating American Carl Lewis. Within 24 hours after the race, Johnson tested positive for stanozolol, an anabolic steroid. He was stripped of the gold and went into hiding. (AP Photo/Gary Kemper)