Afghan refugee boys play on a hill near the slum where they live with their families, on the outskirts of Islamabad, on April 12, 2013. #

Afghan refugee Gul Bibi Shamra, 3, poses for a picture, while playing with other children in a slum on the outskirts of Islamabad, on January 24, 2014. #

Hayat Khan, 8, poses on the outskirts of Islamabad, on January 24, 2014. #

Safia Mourad, age 4. Photo taken near Islamabad, on January 24, 2014. #

Afghan refugee children follow a performance organized by the Hashoo foundation, in a tent at their camp on the outskirts of Islamabad, on February 10, 2011. #

Rozeena Zaman, 7, an Afghan refugee, watches other children playing in a poor neighborhood of Rawalpindi, Pakistan,on February 10, 2010. #

Afghan refugee boy, Abdulrahman Bahadir, 13, poses near Islamabad, on January 25, 2014. #

Robina Haseeb, age 5. Photo taken near Islamabad, on January 24, 2014. #

Akhtar Babrek, age 13. Photo taken near Islamabad, on January 24, 2014. #

An Afghan refugee child hides in a wooden cart near his home in a poor neighborhood on the outskirts of Islamabad, on February 2, 2014. #

Afghan refugee Samiullah Afsar, 5, smiles while carrying a puppy he found in a pile of a garbage, on the outskirts of Islamabad, on October 18, 2012. #

Afghan refugee, Basmina, 3, poses for a picture while playing with other children in a slum on the outskirts of Islamabad, on January 25, 2014. #

Naseebah Zarghoul, age 6. Photo taken near Islamabad, on January 24, 2014. #

Hasanat Mohammed, age 5. Photo taken near Islamabad, on January 24, 2014. #

Afghan refugees play a traditional fighting game in a field, as the sun sets on the outskirts of Islamabad, Pakistan, on January 24, 2014. #

Afghan refugee girls listen to their teacher, during an English language class at their school near Islamabad, on December 19, 2011. #

An Afghan refugee boy stands in a mosque's yard while girls sweep the ground outside of Islamabad, on November 5, 2013. #

Afghan refugee boy, Allam Ahmad, 6, poses on the outskirts of Islamabad, on January 27, 2014. #

Laiba Hazrat, age 6. Photo taken near Islamabad, on January 24, 2014. #

Awal Gul, age 12. Photo taken near Islamabad, on January 24, 2014. #

An Afghan refugee girl wearing a burqa plays with other children in a slum in northern Pakistan, on August 15, 2011. #

An Afghan refugee drinks water leaking from a public water point near Islamabad, on September 17, 2013. #

An Afghan refugee boy plays in a polluted a stream to beat the heat in a slum area near Islamabad, on June 5, 2012. #

Afghan refugee children lie on a pile of straw gathered for the livestock, while playing in a poor neighborhood of Islamabad, on December 5, 2013. #

An Afghan refugee girl, left, looks on while standing with her sister, outside their house, in a poor area of Rawalpindi, Pakistan, on January 27, 2010. #