WTC heute
Cranes tower over ground zero in August 2011, with buildings of the old Manhattan skyline visible in the background. Construction at the new World Trade Center complex should be fully complete between 2013 and 2014.
A view of the memorial museum and empty reflecting pools at ground zero in June 2011: Remembering the victims of the terrorist attacks of Sept. 11, 2001.
Construction at One World Trade Center in May 2011. The American flag hangs between two cranes.
Designed by star architect David Childs, One World Trade Center -- formally known as the Freedom Tower -- will be tallest building in the United States upon completion, topping out at 1776 feet (541 meters). The height will symbolize the year the US became a country: 1776. The building's costs are estimated at $3 billion.
A bird's eye view of Two World Trade Center in May 2011. The building's blueprints were drafted by renowned British architect Norman Foster.
Baby steps: The construction site at Two World Trade Center in June 2011.
Although the scaffolding can still be seen now, in the future, visitors to Four World Trade Center will be able to roam the passageways of the planned shopping center.
A view of ground zero from the north: One World Trade Center, the north reflecting pool (middle right), the museum (middle left), Four World Trade Center (left).
A worker sprays water along the rim of a reflecting pool where the north tower once stood. At the heart of the Sept. 11 memorial are two "footprints" -- large reflecting pools that represent where the twin towers once stood. But rather than being filled to the brim, waterfalls will flow over the edges of the pools.
A construction worker dusts off the roots of one of the 416 trees on the plaza of the Sept. 11 memorial.
Carpenter Bart Chiarizzi: He worked on the construction of the foundation of One World Trade Center, then in the concrete labyrinth underneath the plaza and now on the museum's pavilion. "Most of the time, a job is just a job," he said. "But then you remember that this is hallowed ground."
