[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.

[RaceBannon]

meaning it's probably a WEE bit hard to hijack unless it was someone with multiple personality disorder

Suddenly, I think of Clevon Little in Blazing Saddles!...