ITV News US Correspondent Emma Murphy reports on the lives touched by the 9/11 attacks
There is the enormity of what happened, the images which encapsulate a horror which never dims and a memorial to the dead which reminds of the scale of loss on September 11.
And yet it is the small things which add the greatest poignancy.
The man who is spending Friday cleaning the bronze of the memorial. He has a little brush to wipe the dust from a lot of names.
The parents, older now, but waiting to be interviewed about the death of their child.
Calm, dignified, waiting quietly to speak about their loss.
They wear the smart clothes in other times they might wear to a christening.
Instead of celebrating new life they were instead remembering a lost life.
The man on his way to work who stopped to tell us it is exactly the same kind of morning as that morning twenty years ago.
A beautiful bright sky without a cloud, until beneath a cloud of dust the world changed.
US Correspondent Emma Murphy reports on how the scale of the 9/11 tragedy will be marked by ceremonies around the world on its anniversary as International Affairs Editor Rageh Omaar explains how conflict still continues globally
Yet there is a very different feeling around the site of the World Trade Center. A silence so alien to the city itself.
A calm which belies the chaos which twenty years ago engulfed this place. And a dignity which befits the tragedy that befell so many.