The redevelopment of the World Trade Center is among the most expensive ongoing projects in the world, expected to cost nearly $20 billion by its completion in 2011. A portfolio of photographs taken from three angles above the site shows how, after years of cleanup and delays, the future has begun to take shape. Photographs by Robert Polidori

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The eastern half of the site, facing north towards the Church Street post office and the recently rebuilt 7 World Trade Center at left

Last updated August 05 2008: 1:31 PM ET
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