Behind the door of Army Spec. Jeremy Duncan's room, part of the wall is torn and hangs in the air, weighted down with black mold. When the wounded combat engineer stands in his shower and looks up, he can see the bathtub on the floor above through a rotted hole. The entire building, constructed between the world wars, often smells like greasy carry-out. Signs of neglect are everywhere: mouse droppings, belly-up cockroaches, stained carpets, cheap mattresses. This is the world of Building 18, not the kind of place where Duncan expected to recover when he was evacuated to Walter Reed...