Chronology of defense against airline terrorists.First stop ME males from taking pilot training. No, we can't do that. We need their money. Second defense against airline terrorists. Make terrorist buy uniforms from overseas by forcing all textile manufacturing overseas.
Third defense against terrorists. Make sure all flight schedules and arrivals and departures are written in various languages so terrorist won't have to attend language school to learn language.
Fourth and final defense. Warn people repeatedly that terrorists are getting ready to strike so they will be unconcerned when strike does come.