It's a controlled test. Would you really honestly put your whole and complete trust in something that you have not seen with your own eyes???
So a ring around the building? A Truck is 8' wide give or take 6". So no more than say 4-5' between them? How much will that cost for each and every building?
how is this a anti terrorist device?
Put them around buildings and they can't drive trucks full of bombs into them?