Anyone who has been to Ground Zero will testify it is a remarkable memorial and given its iconic importance in America it is no surprise David Cameron has come here today.
The subliminal message and the often stated message is that al-Qaeda is not defeated but its ability to harm all of us has been degraded.
It is a difficult message to get across on a day when in Afghanistan things are not going very well.
More top news
Storm Imogen will cause problems across much of the south today, but it will be calmer in the north.
David Cameron is expected to warn that voting for a "Brexit" would result in refugee camps springing up across the south-east of England.
Beyonce, Coldplay and Bruno Mars performed a medley of their hits during a powerful half-time performance at Super Bowl 50.