Coated in ashes from the collapsed towers, survivors (top) move through smoke and debris on downtown New York's Fulton Street, about a block from the World Trade Center, on the day of the attack. On July 19, 2006, (bottom) pedestrians stroll the same stretch. Behind them the gateway to the World Trade Center PATH (Port Authority Trans-Hudson) rail station, built in 2003, awaits its replacement in 2009 by a futuristic transportation hub.

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