women 100m hurdles

BEIJING - AUGUST 19: Dawn Harper of the United States crosses the line in first place in the Women's 100m Hurdles Final held at the National Stadium on Day 11 of the Beijing 2008 Olympic Games on August 19, 2008 in Beijing, China.

ATHENS - AUGUST 24: Perdita Felicien of Canada takes of her shoe after she fell in women's 100 metre hurdle final on August 24, 2004 during the Athens 2004 Summer Olympic Games at the Olympic Stadium in the Sports Complex in Athens, Greece. (Photo by Adam Pretty/Getty Images)

London 2012 - Sally Pearson of Australia glides over the final barrier to an Olympic record and gold medal in the women’s 100m hurdles.

London 2012 - Sally Pearson celebrates earning a gold medal for Australia in the women’s 100m hurdles.

London 2012 - Dawn Harper and Kellie Wells celebrate silver and bronze respectively with big smiles and American flags.

London 2012 - Sally Pearson shrieks upon learning she’s won a photo finish race for gold and has set a new Olympic record in the women’s 100m hurdles.