[Lestat]

I'm sure there have been other incidents of smaller planes crashing into buildings... But to my knowledge, this is the first time a fully fueled jumbo jet willfully crashed nose first at full speed into a skyscraper.

I'm just saying that in order for something to be "extremely unlikely" as you state, there should be something to base that opinion on. Since, it's never happened before, there is no sample size from which a claim like this can be (or should be), made. Especially, not by lay-people like us. So I'm perfectly fine with accepting it as being completely reasonable until shown otherwise. I do see your point however.