I'd recommend Wikipedia.com as an interesting intersection for info from several perspectives. I'm particularly interested, on futher review of the updated video (for those who haven't watched them, make sure to see the Updated Video link in the original post, since it includes all the content of the first, plus more) in the following...

*Several people asked about the "19 hijackers" including several people who are alive & free. At least 6 have been reported exactly as such by the BBC, not exactly the top "conspiracy theorists" worldwide, and no strangers to conflict or even AlQaeda attacks, yet they reported the facts here, even including that one man, now in Tunis, had taken flight lessons in Florida as the FBI claimed... He remains a pilot in Tunis!!! Here's the BBC's article: http://news.bbc.co.uk/2/hi/middle_east/1559151.stm
So why deny it so vehemently? (Elvis & 2Pac?! I haven't seen the BBC claim that lately! LOL) Why no US coverage of this?

*And from the FBI's own agents (or ex-agents as they've been canned) is a very different story of pre-9/11 intelligence:
http://video.google.com/videoplay?do...38009368964163
*Molten steel wreckage remained molten for up to 6 weeks after 9/11, despite the clear discrepancy of temperatures that would cause this (kerosene burns far too quickly & too cool to linger 6 weeks later). Many Chemical Engineers find clear fault with the official story.
http://en.wikipedia.org/wiki/9/11_co...r_debris_field
*Structural Engineers also challenge the official theory of the collapse, especially the pulverized concrete, which runs counter to any other building collapse in history. Also the lobby blast damage soon after plane impact, clear in both interviews & live footage. Speeches re: structural analysis:
http://video.google.com/videoplay?do...78758602000405
http://video.google.com/videoplay?do...10169657809939

It's just an interesting convergence of factors that point to all perspectives being theories only. Just like the total disappearance of flight 93, perhaps there were emergency measures taken that are not being openly discussed. Personally, that's my take on the info so far... That difficult questions of life, death & damage were made as that day unfolded, and we will likely not know the actual events & conversations for some time.
However, as both a US & world citizen, I agree with others here that it behooves us to be curious about this tragic & historical event in our lifetimes.