A protester returns a tear gas canister fired by police into the crowd outside of the Ferguson city hall, Tuesday, Nov. 25, 2014, in Ferguson, Mo. Missouri's governor ordered hundreds more state militia into Ferguson on Tuesday, after a night of protests and rioting over a grand jury's decision not to indict police officer Darren Wilson in the fatal shooting of Michael Brown, a case that has inflamed racial tensions in the U.S. (AP Photo/David Goldman)

The Lesson From Ferguson: Riots Work

The country stands in room filled with gunpowder that could ignite an open insurrection, and the police departments are in the room waving a lit match at the people.