Canadian sprinter Ben Johnson crosses the finish line to win the 100-meter final with a world-record time of 9.79 seconds at the 1988 Seoul Olympics on Sept. 24, 1988 (left photo). Three days later he was stripped of his medal after he tested positive for a banned steroid, and had to leave Korea dishonorably. Twenty five years later, the runner returned to Seoul on Tuesday for an anti-doping campaign. At Ritz Carlton Hotel in southern Seoul, Johnson shows a mixed look as he holds the Dong-A llbo`s article of Sept. 24, 1988 headlined "Ben Johnson, world record 9.79 seconds," and another article titled "Ben Johnson is stripped of gold for drug taking," released on Sept. 27. He says, "I will definitely not make a wrong choice if I go back 25 years ago."