Europe’s porous borders pose problems in hunt for terrorists
Clip: 01/15/2015 | 4m 55s
The attacks in Paris and today's raids against militants in Belgium highlight the trend of European Muslims traveling to Syria and Iraq to fight. Gwen Ifill talks to Lorenzo Vidino of the European Foundation for Democracy about Europe’s porous borders and the challenge of monitoring possible suspects.
Aired: 01/15/15
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