Nostradamus: Did Famed Seer Nostradamus Predict the World Trade Center Attack? The first was making the rounds within hours of the attacks. It said:

"In the City of God there will be a great thunder,
Two brothers torn apart by Chaos, while the fortress endures, the great leader will succumb",
The third big war will begin when the big city is burning"
- Nostradamus 1654

Unfortunately, Nostradamus died in 1566, so it's rather unlikely he wrote this passage in 1654. The quatrain is not to be found in his published oeuvre. It's a hoax.
--------------------------------
Yet another reason the internet generation turns to The Tim Times - Enlightening the Internet Generation.