I was just thinking this today. Not necessarily an international event but something massive may happen (God forbid) within the next fear years. All civil rights will be suspended "temporarily".
As sloppy as our immigration policy is...its almost like they want terrorists to come across the border...
Dont forget the biological aspect. Within the last 6 months. Anthrax is 'found' in a mop closet lab box. Ebola popping up (national guard getting ebola kits). Bubonic plague. Mosquitos transmitting crap. And some idiot fucking around with the super flu.
An outbreak would be the perfect excuse to lock people up in fema camps.