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An Afghan refugee boy and his sister enjoy a ride on an improvised swing, in a poor neighborhood on the outskirts of Islamabad, Pakistan, Thursday, Oct. 31, 2013. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, according to the U.N. refugee agency, thousands of them still live without electricity, running water and other basic services.

Muhammed Muheisen/AP

An Afghan refugee boy and his sister enjoy a ride on an improvised swing, in a poor neighbourhood on the outskirts of Islamabad, Pakistan. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, according to the UN refugee agency. Thousands of them still live without electricity, running water and other basic services. Read more

An Indian street child plays in a dry river bed after flood waters receded in Allahabad  on October 25, 2013.

Sanjay Kanojia/AFP/Getty

A street child crosses a dry riverbed after flood waters recede in Allahabad, India Read more

A group of South African girls enjoy skipping a rope, in Soweto township on the outskirts of Johannesburg, South Africa, Monday, July 1, 2013. Former South African President Nelson Mandela is spending his 24th day in a Pretoria hospital in a critical condition. (AP Photo/Muhammed Muheisen)

Muhammed Muheisen/AP

South African girls skipping a rope in the Soweto township on the outskirts of Johannesburg, South Africa on Monday. Read more

Afghan girls play in Kabul...Afghan girls play in Kabul, May 20,

Mohammad Ismail/Reuters

Afghan girls play on a wire fence in Kabul, Afghanistan Read more