so there are moments when the police appear to be firing water cannon further back but they are now moving slowly back and allowing this demonstration to continue. and just left with slightly stinging face from the tear gas that was fired right at us at times earlier in the day. kier simmonsville yantly covering this protest. hans nichols, i m going back to you. these protests we see every time there is a g20, how much of an affect do they have on the meetings that do happen during the g20? very little. heads of state, leaders of the countries, are usually far way. in past you have to get through several security barriers. you will recall other g20s or g7s where they had designated protesting zones.