The Olympic torch has been lit at a ceremony in Greece that was briefly disrupted by pro-Tibet activists.
Protesters from media rights group Reporters Without Borders broke through the cordon of 1,000 police officers in Olympia as China's envoy spoke.
The torch will now be carried around Greece before being sent to China to start a journey through 20 countries, returning to Beijing on 8 August.
The route includes the torch being taken to the top of Mount Everest and through Tibet