Usain Bolt tells CNN he can break 9.76 m world record at London 2012 . The Jamaican star set the current world record at 2009 world championships . Bolt ran the fastest 100m time of Thursday at a meeting in Rome on Thursday . Tyson Gay says Justin Gatlin and Linford Christie could challenge Bolt .
Usain Bolt tells CNN he can break 100m world record at London 2012 . The Jamaican star set the current world record at 2009 world championships . Bolt ran the fastest 100m time of the year at a meeting in Rome on Thursday . Linford Christie says Tyson Gay and Justin Gatlin could challenge Bolt .