Afghan refugee children play at a slum in the outskirts of northwest Pakistan's Peshawar on June 20, 2011. According to UNHCR Pakistan office, more than 3.6 million fleeing Afghans have returned to their homeland from Pakistan during the past 10 years. However, there are still 1.7 million registered Afghans in the country where itself has an internal displacement of millions due to militancy and natural disasters. [Xinhua/Umar Qayyum]