"Sure, a few may come back to haunt us," wrote New York Times columnist Thomas Friedman in arguing to close down the U.S. detention center at Guantanamo Bay. Who are the "few" that Mr. Friedman is thinking of, and what exactly does he mean by haunting? Perhaps the case of Mohammed al Qahtani, a Guantanamo detainee profiled in the current issue of Time magazine, offers insight. From a Guantanamo logbook, Time reports that interrogators did a number of unpleasant things to al Qahtani to get him to talk. These included shaving his beard, stripping him naked, ordering him to bark...