Afghan refugee boys, ply with a balloon in a poor neighborhood on the outskirts of Islamabad, Pakistan, Thursday, Nov. 7, 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. (AP Photo/Muhammed Muheisen), APTOPIX