
Dust from the collapsed towers covers West Street in front of One World Financial Center (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

Remnants of the north tower still smolder in front of Building 6 (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

At the base of the south tower a hole in the ground exposes a piece of the complexs lower levels. The basement of the Trade Center towers extended several floors underground and housed rail lines 
Part of the steel frame of One World Trade Center, the second tower to collapse, stands in front of the badly damaged Five World Trade Center building (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

The damaged New York Telephone building (lower left) stands across from the remnants of Six World Trade Center (right) (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)
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Smoke still filters up from the wreckage. This is the view looking southwest toward the Hudson River (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

A close view of Building 6 shows the damage inflicted when the neighboring 110-story towers collapsed (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

The 47-story Building 7 of the World Trade Center complex collapsed at 5:20 p.m. EDT September 11, nearly seven hours after the final tower collapsed (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)

Emergency workers and specialized teams of urban rescuers battle fires while digging through the wreckage looking for survivors and victims (NEW YORK CITY OFFICE OF EMERGENCY MANAGEMENT)
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