Just south of there, the Line was anchored to the eastern shore of the Gulf of Aqaba on Saudi territory. From the waterfront it cut straight across the desert for more than a hundred miles. From the looks of it, the spine of the city—a pair of tunnels that ran its whole length, whisking people and cargo from one end to the other in high-speed maglev trains—was largely complete. Along most of its length it was just a faint scar on the desert where they’d backfilled lifeless and bone-dry earth over the completed tunnels. The beginnings of train stations and settlements were tidily spaced along its length. The far eastern end of it, 170 kilometers away on the other side of some mountains, she only glimpsed. But in that glimpse she saw neat phalanxes of black rectangles marching across the desert: photovoltaic panels taking advantage of the kingdom’s virtually infinite supply of sun-battered land. Much easier to see, since the airport lay near the Line’s western end, were the port facilities. There were two Chinese ships unloading and another waiting its turn out in the gulf, spewing a plume of soot into the languid, sunny air. In contrast to the ships at Rotterdam, which were a colorful, random mosaic of differently logotyped containers, these were virtually monochromatic. All the containers, with a few exceptions, were yellow, with a green logo. They were all, she could guess, carrying photovoltaic panels or related equipment from the same supplier, and they were all destined for the blank space on the map at the opposite end of the Line.