The enemy is now within. In Europe, anyway, and specifically in Belgium.
The Brussel’s neighbourhood of Molenbeek has become a base for radical Islamic terrorism in Europe.
The 2004 Madrid subway bombings — the deadliest Islamic terrorist attack on the continent to date — had links to Molenbeek. More recently, the Paris attacks were planned from Molenbeek and carried out, in part, by terrorists born and raised in the neighbourhood.