It's a project that touched me as an immigrant and as a New Yorker.
It's a fantastic responsibility and a wonderful moment.
I'm not Candide, nor Dr Pangloss, but we know that faith moves mountains.
I think there is a new awareness in this 21st century that design is as important to where and how we live as it is for museums, concert halls and civic buildings.
I studied architecture in New York. So, really I was very moved, like everyone else, to try to contribute something that has that resonance and profundity of it means to all of us.
I don't get to sleep when I'm in New York. Really. I'm living on adrenaline.
Cities are the greatest creations of humanity.
And then, build a bustling wonderful city of the 21st century, with a restoration of a spectacular skyline, which Manhattan, of course, needs. So, that is really the design as a whole.
And it is very moving because one has to see the site not as just another site of development but it is a very special site. It is a site that souls and hearts of all Americans.
It's about how to bring together the seemingly contradictory aspects of the memorial, which is about a tragedy and how it changed the world, but also about creating a vital and beautiful city of the 21st century.
There will be a competition for the memorial. And then it can be developed with trees, with planting. It can become a very beautiful place protected from the streets, because it is below. And it can be something very moving and very private.
And you have to remember that I came to America as an immigrant. You know, on a ship, through the Statue of Liberty. And I saw that skyline, not just as a representation of steel and concrete and glass, but as really the substance of the American Dream.
Well, I didn't want to have the reminder sort of in the sky, so that people would forever look at it. I wanted to have - really to create a city from the bottom up. From that foundation, which held, from the democratic power of what the site really is.
Winning a competition in architecture is a ticket to oblivion. It's just an idea. Ninety-nine per cent never get built.
The Spiral Gallery may happen, too. It is not dependent on government funding.