the topíz because the same square goes up cut off from the original building.r the elevators kept gettingwa like a tree trunk. you wanted to taper it what is but if you tapered the sides like on osama bin ladennalistic like the washington monument you lose the profile of the original towers so by keeping the sides straight but changing theyo corners you have the interpretation of an osama bin ladennalistic so to speak and clear no you get on obelisk. >> and some people who said why don't you just rebuild the two towers? >> imagine spending billions of dollars to replicate one of the great fact textural mistakes of the 20th sent tree. >> but before it has to be said that those two twin towers had become a symbol more than any os us realized until the tragedy pointed it out but we can no longer build where people parished. we have to build in a differentv position and we have to give that space to people and i think that's, i think, why the skyscraper and all of the otherv ones will be successful because they don't dominate the space. they are symbolic. you see them because of their positioni