Me too, but they've happened before, and will happen again. They've used explosives in the US too.
If only one plane had hit WTC, our government would be telling us it was an unfortunate accident.
The first World Trade Center bomb comes to mind.
The Alfred P. Murrah Bldg. was terrorist (technique) inspired, if not directly assisted by same.
Imagine blowing up a stolen 18 wheeler hauling aviation grade, or racing grade gasoline, kerosene, liquid propane, etc, inside a transportation tunnel that doesn’t restrict such passage, during rush hour?
OK- I’ve got to get off this line of thinking, I’m demoralizing the thread and depressing myself.
Time to shout from the rooftops- TRUMP! TRUMP! TRUMP! TRUMP! TRUMP!