The 9/11 terrorist attack on the World Trade Center in New York resulted in the loss of 2,753 people in the Twin Towers and surrounding area. 

The attacks, which were planned by al-Qaeda from Afghanistan, saw four US passenger jets seized by suicide attackers - two of which were flown into the Twin Towers of the World Trade Center in New York.

Another plane crashed into the Pentagon, just outside the US capital, Washington DC, and a fourth plane crashed in a field in Pennsylvania after passengers fought back.

The total death toll from all four inicidents mounts to 2,977.