[World Trade Center construction site.]

[Workers at the World Trade Center construction site.]

[World Trade Center construction site.]

[World Trade Center under construction.]

[World Trade Center site under construction.]

[Construction of the World Trade Center.]

[Aerial view of World Trade Center under construction.]

[World Trade Center under construction.]

[Workers at the World Trade Center under construction.]

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

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

[World Trade Center under construction.]

[Aerial view of World Trade Center construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

[World Trade Center under construction.]

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

[World Trade Center under construction.]

[World Trade Center under construction.]

[Aerial views of the World Trade Center during construction.]