The final planning for the terrorist attack in Paris last month might have taken place in the Molenbeek district of Brussels—but, like the massacre in San Bernardino, Calif., weeks later, the inspiration came from a continent away, in the self-proclaimed caliphate of Islamic State, or ISIS. The difference: ISIS directly engineered the Paris slaughter, while the San Bernardino killers appear to have simply taken cues from the terror group.
Even so, ISIS propagandists have been promising for months to bring the full panoply of their horror to Europe and the U.S. They began the Twitter hashtag #WeWillBurnAmerica. An article this spring in the official ISIS magazine, Dabiq, promised an attack that would make “any past operation,” including 9/11, look like a mere “squirrel shoot.”