[frandroid]

I understand the easy logic of "oh, but what if they were terrorists", but at the same time, it makes no sense. If you want to blow up a bridge, you don't put explosives at the top of the pillars. You drive an explosives-laden truck to the base, you get out and you leave in a second car. There's nothing anyone can do unless you wait too long to detonate your explosives.

The point is, you cannot prevent all terrorism on home soil through police enforcement. You can choke certain points like airports by doing person-by-person inspections, but you can't do much for land-based transportation infrastructure with millions of autonomous attack vectors. Terrorism is best prevented through political actions.