An Afghan refugee boy, right, launches a kite, while other children play nearby, in a poor neighborhood on the outskirts of Islamabad, Pakistan, Tuesday, April 16, 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. &#40;AP Photo&#47;Muhammed Muheisen&#41; <span class=meta>(AP Photo&#47; Muhammed Muheisen)</span>