He was visiting a project providing computer literacy classes for slum children, some of those who've been bypassed by globalisation.

BBC: Cameron visit takes in both sides of India

When embarking on the film, Meirelles opted to use a cast of unknown amateur actors to play the slum children of Rio, many of them having experienced the hardship of the streets themselves.

BBC: NEWS | Entertainment | Brazilian Meirelles' route to God

Mahdi lives in the Baghdad slum called Sadr City with her five children.

NPR: U.S. Tries for Better Conditions at Iraq Prison Camp

In a primary school near a huge slum in Dhaka, pupils aged between six and 10 include the children of rickshaw drivers and women who break bricks for a living.

BBC: The harsh necessity of child labour

It will end the militias' armed presence in the sprawling eastern Baghdad slum, he said, and clear the district of roadside bombs and mines that the United Nations Children's Fund says has rendered many roads inaccessible.

CNN: Iraqi government, al-Sadr group sign cease-fire

There has been little economic recovery in slum areas, says Father Joe Maier, of the Human Development Foundation, a group working with poor children.

ECONOMIST: Thailand