According to Wikipedia ( https://en.wikipedia.org/wiki/World_Trade_Center )
"When the World Trade Center twin towers were completed, the total costs to the Port Authority had reached $900 million", that is much less than the price paid by the people in the U.S. to sustain last decade's wars.
Please remind the citizens of the U.S. that they are free to peacefully assemble, organize themselves, use available blueprints, dummies, full scale replicas of planes and WTC buildings, in order to reenact, in a remote location, some of the events of September the eleventh 2001.
That will lead to enhanced confidence, credibility and stability. And that will promote prosperity, both in the U.S. and all over the world.