Context: Here 's a brilliant piece from Roger Cohen , penned right before last week 's 9/11 anniversary : Wednesday , September 10 , 2008 NEW YORK : And in the seventh year after the fall , the dust and debris of the towers cleared . And it became plain at last what had been wrought . For the wreckage begat greed ; and it came to pass that while America 's young men and women fought , other Americans enriched themselves .

Question: Why was there a 9/11 anniversary ?
Options:
0. Because Americans enriched themselves .
1. Because 9/11 was a very significant event in history .
2. None of the above choices .
3. Because the dust and debris have been cleared .
Answer: 1