As he took in the details of the room, the door clicked closed behind them. A series of large plexan tanks lined the semicircular wall. There were twelve in all, black tanks about five meters high and cylindrical, about half as wide as they were tall. Machinery hummed and pumped near the base of each vat, and a veritable spider web of fiber-optic cables spread across the surface of the tanks, connecting to sensors and probes. Two catwalks provided access, one about halfway up, and the other at the top where more cables, thicker this time, plunged into the apex. Matrix connections, he knew suddenly.