Families who lost loved ones on September 11 are attending a special ceremony on Sunday to dedicate the 9/11 Memorial at the World Trade Center in lower Manhattan.
The memorial will be open to the public on September 12.
Families are seeing their loved ones' names inscribed on the memorial for the first time at the ceremony.
The site contains original items such as stairs, support beams and the only tree to survive the attack.
SLIDESHOW OF SITE: