Australia's Lauren Jackson (15) shoots over China's Song Xiaoyun (5) in the women's quarterfinal basketball match at the Basketball Arena in London during the London 2012 Olympic Games, on Aug 7, 2012. [Photo/Agencies]

Sprinter Usain Bolt of Jamaica poses with his running spikes and official team uniform for the London 2012 Olympic Opening Ceremony during a photo shoot, arranged by his sponsors PUMA, beside a traditional routemaster bus outside the British Museum in London, on June 1, 2012. Bolt will defend the 100m and 200m gold medals he won in Beijing in this summer's Games. [Photo/Agencies]