I believe it would have been shot down before it got that close. So I am saying that any serious threat would be by something that does not have to get that close, in which case, a yugo - or a suburban if you want to carry more and get a little closer, would be just fine for the job.
BTW, I thought you were HOT when I was in Jr. High!
Thanks for the Hottie comment! LOL! Don't underestimate the threat of a Cessna. Terrorists will use the tools that they have available to their biggest advantage and they will probe our weeknesses to learn how to use them even more effectively (from their perspective).