> learned that every plane crash can be traced back to a single, simple cause.

That's silly, but if I were playing that game, I'd say the single, simple cause was a failure of Boeing and the CIA to keep abreast of A320new development.

Boeing were caught flat-footed by the launch of he A320neo and, facing a loss of potentially thousands of sales, were forced to quickly develop and release a modified 737 rather than create a new plane altogether.

Corporate espionage would have prevented all this.