President Obama arrived in London for the summit with his wife Michelle

World leaders are gathering in London to discuss ways to resolve the worst financial crisis since the 1930s.

The summit takes place amid tight security and police warnings of "unprecedented" levels of protest.

Workers in London’s financial district have been told to dress down and stay home to avoid provoking demonstrators.

President Barack Obama has arrived in London on his first visit to Europe since taking office, with hopes high that he can forge a new global deal.

He will begin a round of meetings with other world leaders, including the UK Prime Minister Gordon Brown, Russian President Dmitry Medvedev, and the Chinese leader, Hu Jintao.

The G20 talks will be accompanied by tight security, with police Cdr Simon O’Brien last week warning the capital was about to see an "almost unprecedented level of activity".

It seems taht each Summit will caused some chaos in the holding country. But why the leaders are together to disscuss how to solve the problems we faced we should appreciate. But the truth is there are too many poor and unfair

To me as a common worker in china wholesale I think everybody in a country should try his best to make a living but not always complain. Only in this way every thing will be get better.