http://www.silverdoctors.com/ferguson-is-a-perfect-example-of-how-quickly-the-streets-of-america-can-descend-into-chaos/
It doesn't take a natural disaster or loss of the power grid or even a sale on the newest Nikes. Revolution against the police state can do it too.
http://www.wnd.com/2012/12/half-of-america-id-kill-to-protect-my-own/?cat_orig=us
"Nearly half of Americans would expect serious, sustained life-threatening civil unrest within two weeks of a major catastrophe, such as an EMP attack that would destroy electronics, according to a new poll."...