At this stage, does it make much difference whether the debris is from the American plane or the United plane? Can we learn anything more of significance about the events of 9/11 from studying this piece of wreckage? I tend to think that the answers to both questions are "no."
About the only thing positive that may come out of this new discovery is more determined opposition to the construction of the proposed super-mosque, which ironically was planned for the same location where the debris was found.
“...which ironically was planned for the same location where the debris was found.”
There is NO irony. No scarring was found on adjacent walls, ergo, the fragment of landing gear was placed there, most likely as a trophy.
Looking at the current prices for steel and aluminum at Vito’s Salvage and Scrap Metals in Jersey, I doubt if the one who placed it was holdng it as a nest egg.