4BC Mornings: Adjunct Professor Clive Williams a specialist in politically motivated violence from Macquarie University.
He speaks to Chris Adams and explains his knowledge of the Sydney based anarchy group Black rose syndicat that is threatening to disrupt the G20 summit in Brisbane in Nov 2014.
He says the group is affiliated with the Black Bloc an anarchist group that disprupted the Toronto G20.
Professor Williams suggests that holding global meetings like the G20 in major cities makes them security risks.
He suggests that an Island would be a better venue.
Do you agree?
Listen now and have your say