Cortex’s current address was less fashionable. The building’s hundred-year-old curtain wall lay under decades of pollution. Long streaks of filth scoured the metal spandrel panels, making it appear camouflaged besides its mile-high neighbors. The roof was covered with satellite uplink arrays, an old water tower, and a large, white plastic structure with red radiation warnings. A thick black cable ran from the fusion reactor to an open escape stairwell, then down into the throat of the building.