An 11-metre-high steel column has been returned to the site of the World Trade Center in New York to become the centerpiece of a planned memorial museum.
The column, weighing nearly 60,000kg, was the last one left standing after the September 11 terrorist attacks in 2001.
It became a symbol of the resilience of New York as it stood in the ruins of the World Trade Center, the BBC reports.
The column was the final piece to be removed in a ceremony which marked the end of the recovery effort in 2002.
Relatives of those killed covered it with messages for those they had lost, presumed buried nearby.
The column has been preserved exactly as it was left and is also adorned with police and fire officer logos, union stickers and spray-painted memorials to some of the emergency workers who died during the rescue operation.
It will be the centrepiece of the planned National September 11 Memorial and Museum.