Take back the plane (three political lessons)
Another excellent take on Flight 93 from the Ottawa Citizen:

3) You do what you got to do: United 93 was the only hijacked plane that did not reach its target, and that's because the passengers rose up and tried to storm the cockpit. Why did they rise up? As the movie shows, the passengers learned from phone calls to family on the ground that the other planes had been commandeered into the Twin Towers and the Pentagon. It was then that the United 93 passengers knew they weren't turning back to the airport for negotiations. When the enemy is on a suicide mission, your only hope is to destroy him before he destroys you. And so the men and women of United 93 died fighting.

If the Islamists -- those seeking to transform Islam from a religion into an expansionist, messianic, violent, political movement -- gain ascendancy in the Middle East, then the suicide bomber "will become a metaphor for the whole region," as the historian Bernard Lewis has put it. Islamists cannot be negotiated with, mainly because their demands, that we become Muslim or we die, are impossible to meet.

Currently the most dangerous Islamist is Mahmoud Ahmadinejad, Iran's apocalyptic-minded president who is holding the West hostage with his quest for nuclear weapons. Right now the world is scared, yet still hoping Mr. Ahmadinejad will turn back to the airport, so to speak.

Very soon we will have our United 93 moment and realize this is one airplane we'll have to land ourselves.