[Preech1]

Ah...the missing crop duster that no one discusses anymore, perhaps??? Or maybe back to my original theory that that Atta and the boys dusted cities before their final flight and it dissipated (mostly) with relatively few sporadic cases appearing as it settled down to earth gradually.

[John H K]

You mean the crop-duster that has no spraying equipment on it, and carried one person, meaning it's probably a WEE bit hard to hijack unless it was someone with multiple personality disorder, not to mention not being any more useful to a terrorist than any number of thousands upon thousands of light planes?
It's missing because it likely crashed in deep water. They'll never find it, which isn't unusual for planes that crash over the open ocean.