In an interview with CBS’s “60 Minutes” Sunday, CIA Director John Brennan warned the Islamic State (ISIS) will eventually try to strike the American homeland. “I’m expecting them to try to put in place the operatives, the material or whatever else that they need to do, or to incite people to carry out these attacks,” Brennan said. “So I believe that their attempts are inevitable. I don’t think their successes necessarily are. … Paris was a failure of intelligence. All but one of the eight terrorists were French citizens, trained by ISIS in Syria. They returned, unnoticed, and attacked six locations killing 130 people.”

Brennan’s is similar to the threat assessment given by James Clapper, director for National Intelligence, when he told the Senate Armed Services Committee last week that the Islamic State would attack within the U.S. He added, “In my 50-plus years in the intelligence business, I cannot recall a more diverse array of challenges and crises that we confront as we do today.” Of course, Brennan is anticipating a scenario where the Americans who traveled to fight with the Islamic State attempt to return to our shores. “We’ve contained them,” Barack Obama once said of the Islamic State — just as the attacks in Paris were underway. But that assessment doesn’t take into account homegrown terrorism, the kind already seen in Chattanooga, San Bernardino and Fort Hood.