We had a UPS plane overshoot the runway here and slammed into a 'forest'.
Amazingly no one was injured but the plane burst into flames and all the cargo was lost.
That was several years ago and had more to do with pilots forgetting to adjust the barometer than terrorisim.
But this is exactly the desired effect. Now every brown truck will be eyed with suspicion
If you really wanted to pork the economy bring these infrastrucures to a halt. You dont even have to blow anything up. In this day of 'abundance of caution' things could slow to a crawl.