Pearson, Harper-Nelson lead way in 100 hurdles at worlds LONDON (AP) — Besieged by injuries, Sally Pearson missed nearly two years. Yet there they were down the stretch, two Olympic 100-meter hurdles gold medalists vying for the title at the world championships on Saturday. Pearson was sidelined by a torn hamstring and Harper-Nelson simply didn't run fast enough at trials to make the squad. Heading into this season, Pearson could tell she was in title-chasing condition. [...] did Harper-Nelson, especially after making a talent-rich team at the U.S.