"It's a tribal state, and it always will be. Whether we like it or not, whenever we withdraw from Afghanistan, whether it's now or years from now, we'll have an incendiary situation. Should we stay and play traffic cop? I don't think that serves our strategic interests"
"Genius is not a possession of the limited few, but exists in some degree in everyone. Where there is natural growth, a full and free play of faculties, genius will manifest itself"
"Liquid architecture. It's like jazz - you improvise, you work together, you play off each other, you make something, they make something. And I think it's a way of - for me, it's a way of trying to understand the city, and what might happen in the city"