`, 27 March 2015 (UTC)  I favor including terrorism cases, for two reasons.  First, as ``external causes`` (mechanical failure, weather, pilot error, ...) decline, ``abnormal`` crashes due to intentional suicidal human action may remain and become relatively more important as risk factors, both as seen from the POV of the passenger, and from the POV of those seeking to make air travel safer.  Second, it is not necessarily easy to decide on the motivation of a suicidal individual.  Some people might reasonably say such people are psychopathic regardless of the motive — political, religious, social (revenge against The Corporation, etc), personal despair, or some complex mixture.  The 9/11 attackers were obviously ``terrorists``, but were they political, religious, or simply nuts?  Does it matter?  How much can we ever know for sure?   17:02`