There have been two knife attacks within just weeks of each other that are being linked to terrorism.
One was a church in Sydney and the other outside a Bunnings in Perth on the weekend.
Both involved teenage boys. So, what’s going on?
Today, investigative reporter Sean Rubinsztein-Dunlop on the radicalisation of vulnerable young people and whether programs to stop it are working.
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Sean Rubinsztein-Dunlop, ABC investigative reporter