An Afghan refugee washes her laundry in a polluted stream in a poor neighborhood on the outskirts of Islamabad, Pakistan, Monday, Sept. 16, 2013. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, with thousands living without electricity, running water and other basic services, according to the U.N. refugee agency.Muhammed Muheisen/The Associated Press