An internally displaced Afghan woman from Helmand province walks to collect winter supplies from the UNHCR at the Charhi Qambar refugee camp on the outskirts of Kabul December 27, 2012. Since the 2001 US-led invasion brought down the Taliban, 3.8 million have returned, leaving 1.6 million behind, most born and brought up in Pakistan. In late October, UNHCR boosted incentives for Afghans to return and around 10,000 Afghans went home from October 23 to November 30 -- more than double the number who were repatriated in the same period last year. AFP PHOTO/ SHAH Marai SHAH MARAI — AFP/Getty Images