US President Barack Obama is due to officially open a permanent memorial to honour those who died in the September 11 attacks on New York and Washington.
The first responders in the aftermath of the attacks are among those being remembered.
But the death toll from an illness contracted during rescue operations continues to mount.
And many are frustrated over the slow pace of compensation.
Al Jazeera's Kristen Saloomey reports from New York.
Source: Al Jazeera