[Henry Druding, the Senior Resident Engineer of World Trade Center.with objects found at site.]

[Objects found in the excavation of the World Trade Center site.]

[Workers at the World Trade Center construction site.]

[World Trade Center construction site.]

[World Trade Center construction site.]

[World Trade Center construction site.]

[Aerial view of World Trade Center construction site with numbers.]

[Aerial view of the World Trade Center site.]

[World Trade Center site under construction.]

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

[George Willig at top of World Trade Center.]

World Trade Center: Outstanding Civil Engineering Achievement

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

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

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

[Installation of the steel grillages at the World Trade Center.]

World Trade Center

World Trade Center

World Trade Center

[Construction of the World Trade Center.]