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Trains may look like large analog devices, but they are teeming with computers. Communications, monitoring, positive train control, fuel management systems, data recorders, power, and engine control systems all heavily involve digital components. It\\u2019s not just locomotives that have become heavily digitized: passenger and freight cars also benefit from many digital sensors and control systems. Because rolling stock runs complicated software and contains many digital interfaces, rail cybersecurity has become an increasingly important topic. In this show, special guest Brian McCord discusses just how embedded digital components are into modern rail cars, what cybersecurity threats exist, and how a researcher goes about discovering cybersecurity issues in an aircraft.