I am very confident . Russia 's Yelena Isinbayeva breaks her own women 's world pole vault record . Leaps 100 meters on her third and final attempt at winning at the Olympics . Jamaican Asafa Powell wins third 100 meters race in a week in 9.82 seconds .
Russia 's Yelena Isinbayeva breaks her own women 's world pole vault record . Leaps 100 meters on her third and final attempt at winning at the Olympics . Jamaican Asafa Powell wins third 100 meters race in a week in 9.82 seconds .