Whether you believe it is a source of good or source of evil, London 2012 has shown we’ve entered a Twitter generation.
![Michael Phelps](https://www.aljazeera.com/wp-content/uploads/2012/07/2012731204232865734_20.jpeg?resize=570%2C380&quality=80)
Whether you believe it is a source of good or source of evil, London 2012 has shown we’ve entered a Twitter generation.
With the London 2012 Games officially starting on Friday, Al Jazeera discovers four Olympic flag-bearing tales.