Didnt building 7 burn down due to the heat of the ash cloud???
I'm not a "truther", but I have looked at a few bits of evidence that didn't fall in line with what was told. Bare that in mind when you read the rest of my post. I'm not on any side, just playing "devil's advocate".
Building #7 had superficial fires only. And in the history of steel buildings, none had been brought down due to fires alone. From the building, it began to collapse in the center, falling straight down into its foundation like a controlled implosion. I'm not saying that this is what happened, but it does make me look at it with skepticism.
The Pentagon. I've seen people ask about where the Titanium engines of the plane that was said to have hit the pentagon went, . . . that they were not found. The hole in the side of the building had no wing marks and was inconsistant with an airplane impact.
The field in Pennsylvania. The field showed what appeared to be a hole and wing marks on the ground. Again, no wreckage of significance was taken from the location. Other airline ground impacts left typical debri, . . this one didn't. Also, there was a google earth photo of the area that showed a natural land formation, . . . a short straight ridge [before the "impact"], . . . that was covered over after the event [if you were to search that location today].
As for the towers, I have no idea. It is obvious what happened to them, as I also saw the event happen live, with the 2nd plane hitting the second tower. So, I'm unsure of what actually happened that day. We may never fully know all the events. However, some things seem to not add up.
Again, I'm not a "9/11 truther", but find a few things odd.