Originally Posted by
xyzzy
How on earth does this prevent anything? A vehicle laden with explosives could still drive through and blow up somewhere in Manhattan. With this system we'd likely be able to tell when and where the vehicle entered the area, but only after it went boom. How does that prevent anything?
Our tax dollars at waste...
I've often wondered the same thing. Although the cameras in London captured pics of the '05 bombers, they couldn't stop them.