We're an experiment that is a little over 200 years old; not much considering the age of other nations.
I am willing to bet an America 75 years from now will be much more a police state than it is today. It is inevitible. I don't like it, but that seems to be natural course of things.

The Feds can't win.

If they don't crack down on terrorist acts, they are the first to blame when another skyscraper is knocked down in the name of Islam. "You didn't do enough to prevent this from happening!"

If they do crack down, they are guilty of eroding our freedoms.  "I want my privacy!"

Which are we more comfortable living with?

Cameras in the neighborhood seem a bit excessive....