wrote:


3. Light aircraft are a possible means of delivering a weapon of some
kind.

Which of these three propositions would you disagree with?

Yes, I agree a U-Haul looks like a far better delivery system, but a
piston GA plane is not out of the question. The bomb used in the first
WTC attack was 1,100 pounds, which is inside the envelope of a 206 to
name just one.
[...]
but it would seem to be
pretty foolish to ignore it, especially considering that it has been
done before.

No security expert would ever address the least likely scenario first
(unless the goal was something other than achieving security).

- Andrew