“I think the next attack will be more sophisticated.”
Possibly, but it doesn’t get more involved than actually traveling to the target nation, going to school to learn how to fly a plane (did you see the cardboard mockups those nuts had in their hotel room of the airline console?), and taking the time to actually send back your unused expense money before going on the one-way mission...
They didn’t actually expect the Towers to collapse. They’ll want to top that.