The poverty in Afghanistan takes a particular toll on children. These youngsters live in a mud-walled home in Kabul's Nasaji Bagrami camp for internally displaced Afghans. In the most dire of circumstances, a parent might abandon or sell a child. David Gilkey/NPR hide caption

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U.S. Gen. John Campbell (left) and Command Sgt. Maj. Delbert Byers open the Operation Resolute Support flag during a ceremony at the International Security Assistance Force headquarters in Kabul, Afghanistan on Sunday. Massoud Hossaini/AP hide caption

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Afghan security personnel inspect a damaged bus at the site of a suicide attack in Kabul, Afghanistan, on Saturday. There was no immediate report of casualties, but the attack was one of several in the last 24 hours that have been blamed on the Taliban. Rahmat Gul/AP hide caption

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At about $15 a gram, saffron is the world's most expensive spice. Rumi Spice has a unique model of employing Afghan farmers who are growing it that aims to double or even triple their annual income. Cristina Hirschkorn/Courtesy of Rumi Spice hide caption

itoggle caption Cristina Hirschkorn/Courtesy of Rumi Spice

Retired 1st Sgt. Keith Melick (right) and retired Army Special Forces Command Sgt. Maj. Roy Wilkins met when Melick, a medic, treated Wilkins after an IED explosion. They were reunited nearly 10 years later. StoryCorps hide caption

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U.S. soldiers stand at a checkpoint around Lakokhel camp in Afghanistan in 2010. Many soldiers return from war suffering from "moral injuries," or dealing with the fact that their sense of right and wrong was violated. Martin Bureau/AFP/Getty Images hide caption

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Gen. John F. Campbell, the top U.S. commander in Afghanistan, speaks during a ceremony in Kabul on Aug. 26. Campbell is overseeing the U.S. drawdown in the country after 13 years of war. Massoud Hossaini/AP hide caption

itoggle caption Massoud Hossaini/AP

Four Americans injured in Iraq and Afghanistan visit Kabul as part of Operation Proper Exit, a program designed for wounded warriors. From left, they are Staff Sgt. Ben Dellinger, Capt. Casey Wolfe, Capt. John Urquhart (who is hidden) and Sgt. James "Eddie" Wright. Sean Carberry/NPR hide caption

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U.S. Marines board a C-130 transport plane as they withdraw from Camp Leatherneck, their huge base in southern Afghanistan. This marked the biggest handover yet to the Afghan army, which is facing a tough fight with the Taliban in Helmand province and other parts of southern Afghanistan. Wakil Koshar/AFP/Getty Images hide caption

itoggle caption Wakil Koshar/AFP/Getty Images

U.K. armed forces and U.S. Marines have ended combat operations in Afghanistan. In a formal handover, British troops stood with peers from the U.S. Marine Corps and the Afghan National Security Forces as the Union Flag and Stars and Stripes were lowered for the last time at the Bastion-Leatherneck complex Sunday. Sergeant Obi Igbo, RLC/AP hide caption

itoggle caption Sergeant Obi Igbo, RLC/AP