Memorial tribute: Horrors of 9/11 still linger

In the park where the Twin Towers once stood, a new memorial highlights the lingering impact of the September 11 attacks.

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    A memorial has been unveiled in New York to remember increasing numbers of 9/11 victims.

    Hundreds of thousands of people were exposed to toxic dust from the collapse of the World Trade Center buildings in 2001.

    And first responders continue to suffer from ill health.

    Al Jazeera's Kristen Saloomey reports from New York.


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