I visited there approx 1 year after,quite a moving experience.
I just moved along the fence looking at the photos of lost loved ones,that was when the scale of what happened really hit home.
I took some photos whilst visiting the site,i did feel slightly uneasy in doing so,i chose to do the photos in black and white as opposed to colour,they are some of the most thought provoking and atmospheric photos i have ever taken,particularly the one of the iron girders that were in the shape of a cross/crucifix.
If you go to NYC take a trip to Battery park,where you get the ferry to Liberty island,there stands a large metallic sphere that was once in the central "courtyard" between the towers,it is still recognisable but carries the holes,dents, and overall damage that was created when the towers went down,i found seeing that also quite poignant.