"Go and sin no more," she cracked, swinging the bus decisively onto a side street. Judging from the frequency with which Willem’s skull was slamming into the floor, this one was not as well paved. They were plunging into puddles that began, but never quite seemed to end. Canopies of trees were looming above the windows. The verdant scene was interrupted by the hard corner of a rusty shipping container. Standing atop it, well back of a coiling fumarole of razor wire, was a young man in a backwards baseball cap and mirror shades, cradling an AK-47 and smoking a cigarette. Others like him came into view as the bus slowed and then stopped. Sister Catherine put it in neutral and stomped the parking brake with a vehemence she might have used to crush a scorpion threatening a pupil. "School’s out," she said.