STOCKHOLM – Twenty prisoners live in one small room. They are handcuffed, their heads shaved, every move is monitored by ceiling cameras. A bucket in the corner of the room is their toilet. The daily routine begins at 6 A.M. They are learning Chinese, memorizing propaganda songs and confessing to invented sins. They range in age from teenagers to elderly. Their meals are meager: cloudy soup and a slice of bread. Torture – metal nails, fingernails pulled out, electric shocks – takes place in the “black room.” Punishment is a constant. The prisoners are forced to take pills and get...