"America will never be the same again," people said on the floor of the Senate, in the streets of New York, and in households across the country, for months after the Sept. 11 attacks. But how much of this instant cliché has turned out (so far) to be true? What has entered into society, into the culture, into the very language, which would not have done so if the attacks had never happened? Surely, fewer Americans would be so familiar with WTC and conversant with W.M.D.s (World Trade Center and Weapons of Mass Destruction); there might not be the concept of "unlawful enemy combatants." Click on more examples at left. Credits:  CBS