In May 2002, Condoleezza Rice said, "I don't think anyone could have predicted that these people would take an airplane and slam it into the World Trade Center."
Yet in 1994 Algerians hijacked an Air France airliner with the
intention of crashing it into the Eiffel Tower.
French officials tricked them into landing in Marseilles to refuel, where they were
overpowered. In 1995, police in the Philippines uncovered an al-Qaida
plot (in which Khalid Sheikh Mohammed was involved) to fly a plane into CIA headquarters.
We even had a 1996 major Hollywood production, Executive Decision, starring Kurt Russell, Steven Seagal, and Halle Berry, in which Islamic terrorists hijacked an international flight with the intent to making into a bomb to be delivered to Washington DC. It was a pretty good film.
We would be better off in thinking about threats to have a team made up of Disney imagineers, Hollywood screenwriters, and science fiction writers to supplement our intelligence agencies which have failed so often.