Documents reveal air-quality concerns over asbestos after 9/11

Documents released to the BBC reveal that officials harbored concerns about asbestos levels in the air following the September 11 attacks on the World Trade Center, contradicting public statements at the time that air quality was safe.

The records suggest asbestos was dispersed "nearly everywhere" in the aftermath of the attacks, according to the newly obtained files, though officials had publicly reassured New Yorkers about air safety during the period immediately following the disaster.