[World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[Aerial view of the World Trade Center construction site.]

[Aerial view of World Trade Center construction.]

[Aerial view of World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[Aerial view of construction of the World Trade Center.]

[World Trade Center under construction.]

[World Trade Center site under construction.]

[Aerial view of the World Trade Center construction site.]

[Aerial view of the World Trade Center construction site.]

[Aerial view of the construction of the World Trade Center, from the Hudson River.]

[Aerial view of World Trade Center under construction.]

[World Trade Center construction site.]

[Aerial view of the construction of the World Trade Center.]