11 September 2011
Last updated at 18:24
Families of British victims of the September 11 attacks on the United States have attended memorial services in London to mark the 10th anniversary.
The first services took place at Grosvenor Chapel and St Paul's Cathedral.
The St Paul's Cathedral service got under way at 1100 BST. The families were joined by 2,000 representatives from the fire, police and ambulance services.
US cleric Dr Courtney Cowart, who was nearly buried alive when the north tower of the World Trade Center collapsed, read to the congregation.
The Prince of Wales and Prime Minister David Cameron laid wreaths in the September 11 Memorial Garden near the US embassy in Grosvenor Square.
In his speech Prince Charles spoke of the "continuing, awful agony" suffered by those bereaved.
About 60 protesters, including members from the Muslims Against Crusades group, were present in Grosvenor Square and set fire to a US flag during the silence.
A similarly-sized group of English Defence League protesters also gathered in response to the demonstration, while another group held up placards reading Muslims Against Extremism.
Services also took place in Belfast, Glasgow and Birmingham.
Members of Clerkenwell Fire Station's Green Watch, London, paid their own tribute by observing a minutes silence for their fellow firefighters who lost their lives in the attacks in New York.