The collapse of the towers is the major symbolic event. Imagine the possibility that they had not collapsed or that only one had collapsed: the outcome would have been completely different.

The brilliant proof of the fragility of global power would not have been the same. The towers, which were emblematic of that power, embody it even in their dramatic end, which resembles suicide.

Seeing them collapse, like from within, we had the impression that they were committing suicide in response to the suicide of the kamikaze airplanes.

[Excerpt from the text on the back cover of the edition]