30 July 2012 Last updated at 21:58

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.

Watch a full replay of the final on BBC Sport's Interactive Video Player.

Available to UK users only