sentences:  Intended torchbearers Choi Seung-kook and Park Won-sun boycotted the event to protest against the Chinese government's crackdown in Tibet.More than 8,000 riot police were deployed to guard the 24-kilometre route, which began at Olympic Park, which was built when Seoul hosted the 1988 Summer Games.On the day of the torch relay in Seoul, Chinese students clashed with protesters, throwing rocks, bottles, and punches.