One World Trade Center is officially one of the world's greenest skyscrapers - Curbed NY

Despite prior setbacks, the 1,776-foot tower was able to achieve gold certification through its diverse range of sustainable features incorporated into its construction, design, and daily operation.

One World Trade Center Freedom Tower - Curbed NY

Ground Zero - Then and Now

Ground Zero - Then and Now

One World Trade Center - Wikipedia

Cities in the Sky, Book by Jason M. Barr, Official Publisher Page

World Trade Center skyscraper opens in NYC - Construction Specifier

One World Trade Center Freedom Tower - Curbed NY

The Status of the World Trade Center Complex, 13 Years Later - 3 World Trade Center

25 Feet Above Street Level, World Trade Center's Liberty Park Opens Today

The World Trade Center Rising

Possible Design Revealed for 5 World Trade Center

One World Trade Center