Attack on the U.S.
Now just a memory...
A famous landmark of downtown Manhattan, the World Trade Center's daily traffic consisted of around 50,000 workers and 200,000 visitors.

The building facts
Construction began: 1966
Completed: 1970
Dedicated: 1973
Architects: Minoru Yamasaki & Associates and Emery Roth & Sons
Owner: Port Authority of New York and New Jersey
Major Tenants: Port Authority of New York and New Jersey, Sumitomo Bank, U.S. Customs House, New York Mercantile Exchange and more than 1,000 other businesses and trade organizations

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Trade Towers
The World Trade towers are thought to have the highest level of security apart from the New York Stock Exchange.

Security personnel includes private security companies and the Port Authority's own World Trade Center police force.

All visitors require a photo I.D. to enter the towers. Staff have permanent passes, but VIPs, visitors and service people must line up and show a passport or Driver's license to have their photo taken for a temporary pass.

Everyone must pass through electronic or manned security gates where their I.D. is checked and their bags are searched.

There are security cameras on every floor, and each elevator bank is cordoned off and monitored by at least 2 security officers.