Publicly questioning the official 9/11 story is a great way to be ridiculed. The media and other propaganda outlets have so effectively labelled anything contrary to the party line as "conspiracy theory", discrediting anyone who points out the hundreds and hundreds of holes in the official story. The only credible theory (taking a cold look at the facts that have come to light over the past 12 years) is that AT THE VERY LEAST the US Government knew about 9/11 in advance.
Maybe, with time, it will become more socially acceptable to openly wonder what really happened. And probably by that time, most people won't give a shit.
If you do have some knowledge I don't, putting it in an accessible form like that would be very helpful - a lot of 9/11 "truth" material is steeped in scifi conspiracy nonsense or global elite lizard people type stuff. Or if you ask for clarification, you're told to watch a 2 hour youtube video filled with "many experts agree that this is wrong" weasel words.
http://en.wikipedia.org/wiki/Able_Danger
The 'official' conclusion was that the program did not correctly identify the 9/11 hijackers and plot in advance, but not everyone involved in the operation believes that.
One particularly good example: John Farmer, Jr., senior counsel to the Commission stated that the Commission "discovered that...what government and military officials had told Congress, the Commission, the media, and the public about who knew what when — was almost entirely, and inexplicably, untrue." Farmer continues: "At some level of the government, at some point in time … there was a decision not to tell the truth about what happened...The (NORAD) tapes told a radically different story from what had been told to us and the public."[1] Thomas Kean, the head of the 9/11 Commission, concurred: "We to this day don’t know why NORAD told us what they told us, it was just so far from the truth."
[1]: http://www.stltoday.com/entertainment/books-and-literature/r...