2 police cars and a half-dozen buildings burned in violent protests in Ferguson after grand jury decision.
Pres. Obama calls for peaceful protests: "There's never an excuse for violence."
Grand jury documents show Officer Wilson's account of why he shot Michael Brown... saying he looked like a "demon" and "Hulk Hogan."
Grand jury evidence released: thousands of pages of testimony, evidence and photos.
Brown parents says they're "profoundly disappointed" but call for "positive change" after decision.
What's next for Officer Wilson: possibilities include Brown family civil lawsuit or federal civil rights charges.
Not just Ferguson: protests staged nationwide, including in New York, Los Angeles and Philadelphia.
Ferguson's "tank man" evokes memories of protests of Tiananmen Square.