Arjun nodded. "Plans for it were drawn up. Studies commissioned on how it might be constructed, in orbit or on the surface. It was deemed too ambitious. So wiser heads prevailed," said Arjun, "or so it seemed at the time, and we built what we built. We can always make something bigger later, they said. But it didn’t turn out that way. Blue forgot about it. Red didn’t. Their Jinns put as much effort into thinking about it as our Ivyns put into epigenetics. As soon as they closed the border and put up the two turnpikes, they went to work. What have they been doing that whole time?"