the firey crash left pilot joseph stack dead as well as one man who happened to be in that building at work. so was there some kind of security lapse here? is this kind of tragedy preventable? let s talk about it with craig fuller the president and ceo of the airline pilots associati association. craig, how often does this kind of thing happen that a pilot uses his plane as a weapon to commit suicide? it s extraordinarily rare. there are 600,000 pilots in the united states. and we fly well over 20 million hours a year. we look back at over 30 years and really discovered probably fewer than two incidents where a plane was used to commit suicide in the course of a year.