Exposure related health conditions still trouble 9/11 first responders 20 years later

Saturday marked the 20th anniversary of the Sept. 11 attacks. On that day and for weeks after, first responders at the World Trade Center worked to clear rubble and to search for remains. Many were stricken with debilitating illness, including chronic obstructive pulmonary disease (COPD). We hear from some of them, as Amna Nawaz reports on the challenges first responders are still facing.

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