Still angry, Carla headed for the main room and shut off the fuel cell. She stood for a moment or two in the silence, debating which exit to take. The door marked "emergency" probably led straight to the surface. It would be the quickest way out. But she didn’t know what she’d find there. The carefully landscaped grounds were probably patrolled by security guards and bristling with hidden sensors. The smarter thing to do would be to go back the way she came. She still had the employee ID badge, after all. It wasn’t that late yet. She could just say she’d been putting in a little overtime, and stroll right out the front doors. But she had to check on something, first.