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[bleep] [background sounds] david: canadian police firing tear gas near protesters in ottawa, this after making a hundred arrests yesterday while cracking down on truckers for defying orders to clear out. matt finn is following it all in ottawa. matt, i saw you in the last hour, and you could hear the sound -- we thought they were flash and bang rounds, but those were actually rounds from tear gas canisters, right? >> reporter: you know, it's not entirely clear. it sounded like a flash bang and maybe the tear gas canisters came afterwards. we can't really confirm that right now. but nonetheles...