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The government has pledged a multi agency inquiry to find out how the worst act of terror in New Zealand history came about, including the suspect's travel and social media use, to determine whether it could have been predicted or prevented.
Details of that inquiry will be made public by the Prime Minister before next Monday's cabinet meeting.
Clive Williams is a former Director of Security Intelligence for Australia's Department of Defence, now visiting professor at the ANU's Centre for Military and Security Law.
He describes the Christchurch mosque attacks as a catastrophic intelligence failure but also acknowledges how difficult it is to prevent lone wolf attackers.
