World remembers September 11, two years on

World leaders and relatives of victims joined together around the globe today to pay tribute to the victims of the September 11 attacks with remembrance services including a tree-planting ceremony in Australia and the opening of a memorial garden in London.

Governments marked the second anniversary of the attacks by pledging to pursue the international campaign against terrorism alongside the United States, with some suggesting similarities between the strikes in New York and Washington and acts of violence in their own countries.