Cities Rocked by Past Unrest Offer Lessons in What, and What Not, to Do - NYTimes.com:
"The trigger for civil unrest in Ferguson, Mo. — the fatal shooting of an unarmed black man by a police officer — has also provoked riots in American cities both small and large in the last two decades. But few of those disturbances were as stubbornly resistant to resolution as the Missouri protests, which now have drawn the National Guard and even the White House into efforts to restore calm."
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