US President Barack Obama has said the annual act of remembrance for the victims of the 9/11 attacks provides the chance to recommit the nation's values.
In an address at the Pentagon in Washington, Mr Obama said: "No act of terrorism can change what we stand for."
More top news
Four people are presumed dead after heavy rainstorms triggered flooding in south-west Germany.
A man has been arrested over an offensive Hillsborough shirt
Early low cloud will gradually retreat to North Sea coasts to leave many with a fine day, particularly in the west.