On Thursday, President Barack Obama declared in an interview that ISIS had been "contained," asserting that the terror cell had been stalled in Iraq and Syria. The next day, ISIS claimed responsibility for one of the worst terror attacks in European history, shattering what had been a growing sense of momentum in the global fight against extremists and driving home the frightening ability of ISIS to inspire and possibly coordinate attacks outside their power base in Iraq and in Syria. "We, including the President, have said from beginning the fight against ISIL would be long and have both good and...