Antiwar.com journalist Justin Raimondo challenges the official story of 9/11. I think Raimondo gets to the heart of the issue by avoiding getting lost in the trees of blackbox recorder data and nano-thermite molecules while missing the forest of the implausibility of the official explanation.
Take a look at his archive of articles detailing the evidence of involvement of foreign intelligence services, particularly the Israelis, within the US. Unmentioned in this article is the unusually cozy relationship between the CIA and ISI and their joint involvement with bin Laden pre-9/11. The official story is obviously sanitized and the single most important question surrounding the events of 9/11 is why. If the official story is so obviously true, then why does it need to so heavily redact the relevant facts? And by "facts", I mean accepted, uncontroversial facts, not speculations about whether WTC 7 was demolished or what trajectory the Pentagon plane actually flew.
We should never forget that our government alone is responsible for the deaths of 100's of thousands of innocent human beings (our involvement in European carpet bombing, fire bombing, Hiroshima, Nagasaki and Operation Keelhaul). We should never forget 9/11 and we should never stop asking questions wherever the facts do not fit with the "accepted" explanations. The government refused to do a proper investigation of this tragic event, so that leaves the US citizenry with no choice but to do our own, without the millions of dollars of tax funding.