In the spring of 2003, for a brief moment, many Americans bought the idea, that the Iraq war was over. But why didn't the war end with the fall of Baghdad? And why were we programmed to think it might?
A growing number of high-ranking American officials say that ISIS, the militant group that controls much of northern Iraq, must be defeated. The White House is considering plans to send ground troops to aid Iraq in the fight, but experts say even those expanded plans won't be enough to win.