9-11 doesn't need a year date, 2001. 9-11 is one of those dates -- at least in the American mind -- that lives in a category named "inconceivable." It's a date when the twin towers of American mythology -- invincibility and transparency -- came crashing down.
We are now more than a dozen years in front of that day, but 9-11 is still with us: perhaps a bit submerged in our consciousness, but no less potent than it was on that beautiful NYC morning.