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In March, the terrorist group known as the Islamic State struck in the heart of Europe for the second time in six months. The attack in Brussels caught European security forces flat footed; even though there were indications that attackers—who were trained in Syria—were poised to strike.
The Islamic State’s core in Iraq and Syria is now under intense pressure. It is time for the campaign against it to put increased attention on countering the group’s pipeline for international terrorism -- the fighters who might return to threaten their home countries. The group has generated a heightened terrorist threat to the West and to all the countries from which its members come due to its ability to vet and train the 30,000 or so foreign fighters who have travelled to Iraq and Syria, and to redeploy them to their home countries. The current threat might at least equal what al Qaida could muster at its peak.
Competing proposals from U.S. politicians to commit thousands of U.S. ground troops to Iraq and Syria, or to vigorously police and patrol Muslim communities in the West simply do not address the Islamic State’s ability to infiltrate the group’s trained foreign fighters back into their home countries. Targeting training camps in Islamic State territory, as well as monitoring and detecting the group’s returnees from Syria, are increasingly needed to address this threat.
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