Ground zero rebuilding in New York still unfinished, 20 years later

A woman walks by the colourful murals that surround the foundation for 2 World Trade Centre in New York (AP Photo/Mark Lennihan)

Two decades after its destruction in the September 11 attacks, the work to rebuild the World Trade Centre complex in New York remains incomplete.

Two planned skyscrapers, a performing arts centre and a church are still unfinished at the site, which on Saturday will see the annual ceremony honouring nearly 3,000 people killed in the attacks.