As my French friends, colleagues, and acquaintances agonize over what is to be done in the aftermath of the Paris attacks, the best advice I can think of is to look at Israel.
This tragedy was not "France’s 9/11." Al-Qaeda effectively depleted its stateside human assets in that attack and never regained the ability to strike the American heartland. This is France’s Al-Aqsa Intifada – unfortunately, more of the same is absolutely going to follow. Whatever one’s political predisposition to Israel’s counterterrorism policies may be, its success fighting Islamist terror over the past two decades is the only real-world model for overcoming the specific challenges France now faces.