Crossing Continents - Islam and Canada

Bill Law investigates the extent of Islamist extremism in Canada, after the foiling of a plot by a gang of young Islamists, born and raised in Canada, to blow up the country's parliament. In a country which prides itself on equality and fairness and where many Muslims have prospered while maintaining their cultural and religious identity, how deep are the twin threats of Islamist extremism and of official over-reaction?