Olympic swimming: Gold for Missy Franklin in 100m backstroke
Teenager Missy Franklin wins gold for USA in the women's 100m backstroke at the London 2012 Olympics.
The 17-year-old clocked a time of 58.33 seconds, with Australia's Emily Seebohm taking silver, Japan's Aye Terakawa winning bronze.
GB's Gemma Spofforth finished in fifth place.
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