You can drill the initial failure, but not really the cascading events. In something as large as a global airline you are dependant on 1000s of third parties ac

You can drill the initial failure, but not really the cascading events. In something as large as a global airline you are dependant on 1000s of third parties actions and the weather. No simulated drill is going to be sufficient or realistic. The only way to really mitigate or plan for something like this is multiple layers of segregation so that events in one area have less or no impact on others. Then you could drill total failure in various segments.