The specter of social unrest was raised at the U.S. Army War College in November in a monograph [click on Policypointers' pdf link to see the report] titled "Known Unknowns: Unconventional 'Strategic Shocks' in Defense Strategy Development." The military must be prepared, the document warned, for a "violent, strategic dislocation inside the United States," which could be provoked by "unforeseen economic collapse," "purposeful domestic resistance," "pervasive public health emergencies" or "loss of functioning political and legal order."

There are 400 sites around the US with accommodation and barbed wire.