Ten years ago this week, Americans were about to be introduced to a strange new concept, as they awaited the U.S. war to bring regime change in Iraq. Coined by American military officers, it encapsulated a situation in which everything went right until everything went wrong. The term was "catastrophic success." But before the war began, supporters were bursting with confidence. Vice President Dick Cheney predicted that "we will, in fact, be greeted as liberators." The Pentagon expected to withdraw most troops by summer's end. Reconstruction would be a bargain because Iraq would pay for it with oil revenues. Wrong,...