World champion Sally Pearson powered to Olympic gold in the women's 100m hurdles final on Tuesday, setting a new Olympic record in the process.
The Australian exploded out of the blocks but had to fend off a late challenge from defending champion Dawn Harper of the United States to clock 12.35 seconds.
Harper took the silver in 12.37, a lifetime best, with the bronze going to Kellie Wells, also of the United States, in 12.48.
