Too bad for the hijackers
but sadly imho, there will be another 9/11 (tho I sincerely hope not) but it won't be via the use of an airplane (and also imho, if it happens in the U.S., it will be another we-had-all-the-pieces-but-the-left-hand-didn't-talk-to-nor-play-well-in-the-sandbox-with-the-right-hand situation)