I have always had a camera with me at work. I've applauded and sent money to candidates who have aired images of dismembered fetuses to show the face of abortion. Had I been at the WTC that day and escaped, you can bet there would be SOME pictures out there for all to see.
So far the only image of a dead body that I have seen from 9-11-2001 appeared in the French edition of Photo Magazine. The body was in a body bag (which I cannot recall if it was fully zipped or not). The American edition of Photo that month also covered the 9-11 attacks. Both magazines always maintain completely different content. The US version contained no images that even approached the stark reality of that one.
Even images of the bodies falling are suppressed these days.
There are pictures out there. I inadvertently found some the other day. We must never forget.....