The Paris terror attacks yielded fresh urgency in Washington over the need to defeat the Islamic State, but no clear strategy emerged Monday amid warnings from both the government and the militant group that the United States could face similar assaults on the homeland.

During a day filled with second-guessing, competing ideas and bipartisan criticism, only one thing was clear: The tragedy that left at least 129 people dead in Paris, the capital of America’s oldest ally, was a game-changer in a 15-month campaign that has failed to contain the Islamic State despite a U.S.-led air war that’s include more than 8,100 air strikes.

Three days after the Paris tragedy, CIA Director John Brennan delivered a chilling prediction that similar terror attacks are likely in store for the United States and allied Western countries.

Saying that the French attack was probably not “a one-off event,” Brennan, using a common acronym for the Islamic State, added: “This is something that was deliberately and carefully planned over the course, I think, of several months. I would anticipate that this is not the only operation ISIL has in the pipeline.”

That warning was amplified by a direct threat issued in a new video posted on a website the Islamic State has used to broadcast previous messages. In it, a man wearing a turban and military fatigues, identified in subtitles as “al Ghareeb the Algerian,” states: “We say to the states that take part in the crusader campaign that, by God, you will have a day, God willing, like France’s, and by God, as we struck France in the center of its abode in Paris, then we swear that we will strike America at its center in Washington.”