Families and leaders mark 20th anniversary of 9/11 - BBC News
Commemorations have taken place on the 20th anniversary of the 11 September attacks.
Commemorations have taken place on the 20th anniversary of the 11 September attacks.

A minute's silence was held at the exact time each hijacked plane crashed.

George W Bush, who was the US president at the time, gave a speech in Pennsylvania, where one of the planes crashed into a field after passengers overpowered the hijackers.