To cut the flow of recruits and funds to ISIS, we must make ISIS look unattractive and weak—drab. This is what we have to teach our enemies and those tempted to join them: disenchantment.

It’s becoming increasingly clear that the Paris massacre will reopen debates about encryption and surveillance in a big way.

The war against terror has a long way to go, and we must brace for more horrors like the ones so recently visited on the City of Light.

Belgium’s challenge in dealing with radicalized Muslims provides important context for the Paris attacks.