The tent, stocked with various boxes, sat atop a concrete floor. In the center of the floor, there was a round steel hatch. The steel hatch was operated with a wheel lock, like a bulkhead door of a submarine. Peter Jansen spun the wheel and lifted up the hatch. A ladder went down into darkness. “I’ll check it out.” He put the headlamp on his head and switched it on, and descended the ladder. He ended up standing in the middle of a dark room. As he swung his headlamp around, the beam fell across bunks and tables. Then he spotted a
