“When Davis finally went back and turned the flashlight on, he saw that the walls near the door were dented and pitted—the telltale marks left by fragments of explosives. “You have been using explosives here,” he declared. “No, no,” Petukhov insisted. “Those marks come from the hammers we had to use to make the door fit when we were constructing the building. It was poorly made by our factory, you see.”