It's a date many people will never forget - 11 September 2001. As the twin towers in New York collapsed, adults and children alike watched the horror unfold. This Newsround special, the first of two programmes this week about the terrorist attacks on America, looks at the events of the past three weeks through the eyes of children around the world. (S) (W)

Terror in America: the British Victims and Survivors is tomorrow at 8pm