[World Trade Center construction site.]
[World Trade Center site under construction.]
[Workers at the World Trade Center construction site.]
[World Trade Center under construction.]
[Aerial view of the World Trade Center construction site.]
[Workers at the World Trade Center under construction.]
[Construction of the World Trade Center.]
[Aerial view of the World Trade Center site.]
[Aerial view of World Trade Center under construction.]
[Aerial view of World Trade Center construction site with numbers.]