Here are some of the reasons we’ve held people at Guantánamo, according to files obtained by WikiLeaks and, then, by several news organizations: A sharecropper because he was familiar with mountain passes; an Afghan “because of his general knowledge of activities in the areas of Khost and Kabul based as a result of his frequent travels through the region as a taxi driver”; an Uzbek because he could talk about his country’s intelligence service, and a Bahraini about his country’s royal family (both of those nations are American allies); an eighty-nine year old man, who was suffering from dementia, to explain documents that he said were his son’s; an imam, to speculate on what worshippers at his mosque were up to; a cameraman for Al Jazeera, to detail its operations; a British man, who had been a captive of the Taliban, because “he was expected to have knowledge of Taliban treatment of prisoners and interrogation tactics”; Taliban conscripts, so they could explain Taliban conscription techniques; a fourteen-year-old named Naqib Ullah, described in his file as a “kidnap victim,” who might know about the Taliban men who kidnapped him. (Ullah spent a year in the prison.) Our reasons, in short, do not always really involve a belief that a prisoner is dangerous to us or has committed some crime; sometimes (and this is more debased) we mostly think we might find him useful.