When is the next 9/11 going to happen ?

[Banquo's Ghost]

I forgot - never argue with a writer.

Indeed, verbosity will bore you out of the debate every time

I don't worry (much) about the fifty guys highjacking a fleet of 747s scenario; I worry about the five guys with handguns, a gallon of gasoline, and a Bic lighter, using their imagination and will power to do something unexpected and all out of proportion to their numbers and perceived capability.

That's my point. The latter scenario is relatively easy to pull off, and if al Quaeda was half the organisation it is made out to be, this would be happening all the time in downtown USA.

But the OP was asking about a 9-11 style spectacular.