At the very end of the journey, the railroad track and the road became one, a strip of pavement with embedded rails, as they funneled through a short tunnel that had been blasted through a rock spur. The spur had nearly vertical sides and served as a natural barrier between the northern expanse of the Bar S, which was mostly alluvial flatland, and more broken and rugged terrain beyond that straddled the crest of the mountain range. Once they’d emerged from that tunnel—which the train passed through at no more than a brisk walking pace—they entered into a natural bowl, a few kilometers long, embraced by the primary crest of the mountains, which now loomed above them, and the smaller but more precipitous offshoot spur they’d just tunneled through. The railroad track curved round and sidled along the base of the spur before terminating. This was the end of the line. The curve enabled them all to peer forward out the windows and see that, ahead of them, the freight cars had come to a halt adjacent to various cargo handling facilities in what was apparently the main complex. This was underwhelming visually, but Saskia knew from satellite pictures that most of it was belowground. Separated from that complex by a stretch of open, uneven ground was a neat village of mobile homes, surrounded by a wall of shipping containers. It reminded Saskia of military outposts she’d visited in places such as Afghanistan.