sentences:  United States ran the event without their top two qualifiers from the Olympic Trials.world record holder Butch Reynolds was injured before the games and 400 meters gold medalist Michael Johnson was injured during his 200 metres 19.32 world record.Seizing the opportunity of a weakened US squad, Britain's Iwan Thomas shot out to a lead from the gun putting a big gap on USA's Lamont Smith to his inside.