Century VI quatrain 97 :

Cinq & quarante degrez ciel bruslera,
Feu approcher de la grand cite neuve,
Instant grand flamme esparse sautera,
Quand on voudra des Normans faire preuve.

Op vijfenveertig graden noorderbreedte zal de hemel verbranden
Het vuur nadert de grote nieuwe stad
Op hetzelfde moment laait een grote, machtige vlam op
Als men de Noormannen op de proef probeert te stellen

On fourtyfive degrees north latitude the heaven will burn
The fire approaches the great new city
At the same moment a huge powerful flame arises
When they try to test the Normans

This verse makes it clear that the US was attacked, I will explain the verse.

For the first sentence we don't need an explanation, it is New York which is meant here.

The second sentence informs me about the second plane approaching New York and the third sentence says that the first plane hits the WTC AT THE SAME MOMENT the second plane approaches the city, Nostradamus couldn't make it easier for us.

Fourth sentence clearly indicates that somebody else than the Normans was behind the attack, because they wanted to test America, note.......TEST America !!!

Although Building 7 was blown up by the New World Order as the Twin Towers were also blown up with explosives by them.