Aviation accidents, even though rare, will still manage to shake you up. The main reason being that in this face-paced life, people usually prefer travelling by air rather than by road or sea and as such aviation safety has been one of the main topics of concern for most commercial airlines.
It has been found that most aviation accident happen due to pilot error that might either be weather related or mechanical in nature. Their is a 13 % chance for error by the ground staff but that does not rule out that accident cannot happen because of that. Also in recent times, after the 911 incident no one can deny the fact that even terrorism can be one of the main reasons behind aviation accidents.