She was still puzzling over the message as the bus pulled up in front of the main terminal and disgorged twenty or so locals, mostly airport workers. As Olivia gazed into the terminal building, all her alarm bells went off at once. All the bad things that she’d been trained to look for were there on display, as if this were a spy training film, carefully designed to depict the worst imaginable scenario. Every bench, every snack bar, every security checkpoint had one or two loitering, watchful men, pretending to pay attention to their mobile phones. Some of them even had the temerity to wear sunglasses indoors.