The Morrison government has shown no enthusiasm for repatriating the family members of IS fighters. But as other nations bring back their own fighters, Australia may find itself forced to act.
Allowing our citizens to be somebody else's problem, out of sight and out of mind, does not actually make the security risk to Australians go away.
The deadly Sri Lanka attacks show a return to the coordinated, sophisticated strikes employed by al-Qaeda in the 2000s, focusing on soft targets with vulnerable institutions.
A schoolgirl who left Bethnal Green to join Islamic State in Syria is now in a refugee camp and wants to return to the UK.
There are many obstacles to successful prosecution, including obtaining evidence in a war zone and using foreign intelligence in court.