She turned right and ran along the hallway. The floor angled down again, black rubber tiles silent under her feet. As she moved deeper, a series of large pipes joined her to run along the ceiling. She knew their color coding from the Marines: blue for cooling, red for power, black for data. The size and number of the conduits grew until the corridor became more a duct than a space. The cooling and power systems were larger than anything she’d ever seen. Only the data pipe remained thin, barely larger than fed a typical Brooklyn apartment building.