A worst-case scenario is that a terrorist with a laptop would sit among the passengers and take control of the airplane using its passenger Wi-Fi, said Rep. Peter DeFazio, D-Ore., a member of the House Transportation and Infrastructure Committee who requested the investigation. "That's a serious vulnerability, and FAA should work quickly" to fix the problem, DeFazio said. The avionics in a cockpit operate as a self-contained unit and aren't connected to the same system used by passengers to watch movies or work on their laptops. But as airlines update their systems with Internet-based networks, it's not uncommon for Wi-Fi...