[Afghan refugee Hasanat Mohammed, 5, poses for a picture while standing outside his home in a poor neighborhood on the outskirts of Islamabad, Pakistan yesterday. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, and according to the U.N. refugee agency, thousands of them still live without electricity, running water and other basic services. Photo by Muhammed Muheisen via AP]