A short tour of US concentration camps at Kabul, Gardez, Khost, Asadabad, Jalalabad and (if you're still able) Kandahar
Camp Salerno, on the outskirts of Khost, is a bleak soviet era base in which the 1,200 troops of Operation Taskforce Thunder are billeted in tents and new concrete dormitories.
Afghanistan's allure eludes most people, but it has seen a steady stream of foreign occupiers since the 18th century. First came the British, followed by the Russians, and most recently the Americans. In between there was a brief interlude of Afghan independence under the Taliban, who banned music, made beards compulsory (for men) and forbade going to school (for women). Since most rules carried the death penalty there were many people to execute. They even used the goal posts 
of Kabul's soccer stadium to hang them. But it was their collusion with Mr. bin Laden, rather than anything else, which caused their downfall.
Since its liberation though, the country has become the hub of a network of “detention camps” as the US government puts it, or “concentration camps” as they would more accurately be described (none of the inmates are subject to any legal oversight). The camps' inmates are not merely suspected Taliban or even al-Qaeda members from the area, but anyone picked up anywhere in the world. They may have been captured at random, like the BBC's Afghanistan correspondent, Kamal Sadat, who was seized by soldiers, hooded, and warned he would be killed if he made a noise, let alone a broadcast. Or, like Maher Arar, who was arrested at New York's John F. Kennedy airport, they may have been specifically sought out. Arar, a Canadian computer programmer, was “rendered to the camp on information obtained.” Whether captured at random, or kidnapped to order, even US military intelligence officers admit that nearly all of the prisoners are entirely Innocent.
But then, these situations are reminiscent of the Salem Witch Trials. Names are tortured out of those already in custody. And silence (let alone denial of guilt) Is considered evidence against you, so plenty of names are going to come up. At least Kamal Sadat was released three days after the BBC complained to the US government. Others, such as Mohammed Khan, grabbed in Pakistan, are returned to relatives covered in wheals, scars and a US Army issue body bag. “He was bitten by a snake and died in his cell,” explained Colonel Gary Cheeks, sometime head of the Camp, to reporters. Metaphorically speaking, he's right on the money.
Disinformation pointCuriously, Afghanistan had a more-or-less independent, more-or-less progressive egalitarian government in the 1980s. Attempts by the US, then under Jimmy Carter, to topple this led to increasing Russian intervention, which paved the way for the Taliban. Western subversion preceded the Russian intervention.
On February 7, 2002 President George W. Bush signed a memo confirming the Justice Department's position that “none of the provisions of Geneva apply to our conflict with al-Qaeda In Afghanistan or throughout the world.”
Few Afghanis will go near the bases, but if you persist you can usually find a desperately poor taxi driver to take you close enough to be arrested and so get a proper visit.