“Black bloc” is a tactic that is utilized by groups who normally dress in black. Their faces are covered. They blend in with the crowd, and then at some point they dress in their black outfits, break away, and do what we saw at the G-20. The type of damage we saw at the G-20 is not unusual for black bloc tactics. Once they're finished doing that, they blend back into the crowd, take off the black outfits, and go back to the clothes they were wearing before. They're very difficult to find because of that.
On October 25th, 2010. See this statement in context.