Reporter: Liz Hayes
Producer: Stephen Rice
It was brazen and brutal. When a British soldier was run down by a car in London and then hacked to death with meat cleavers, it signalled the beginning of a new and frightening form of terrorism.
Two British born, Muslim men at the scene, hands bloodied and still carrying their weapons waited patiently for police to arrive - all the while spreading their message of hate to stunned onlookers.
It raises the frightening question - how do you counter terrorism by young radicalised men, willing to act as individuals with no threat or warning?