Where can I get free stock footage of rioting and general civil unrest from online? Have tried searching Google, but all I can find are top end stock footage sites like ITN source.

Ever watched the 2000 Dawn of the Dead remake with all the news footage clips at the start?
I'm thinking of stuff like that.

Grateful for any help.

(Edit: no need for the link especially as you work for a SEO company. Luckily they dont seem to be one of your company's clients so I'm cutting you some slack. Consider this a friendly advisory notice.)