In order for the premise of Loose Change to be accurate, it would have had to have been the largest, most far-reaching conspiracy in history and would have involved hundreds, if not thousands, of people who, so far, have all managed to be convinced to keep their mouths shut....not very plausible in this day and age of easy information exchange and intense media scrutiny. This story belongs in the National Enquirer rather than a legitimate publication.
Like many situations, it is easy to second-guess decisions and lack thereof after events have transpired. Mistakes were definitely made prior to 9/11....none of them deliberate in my view.
That said, I do believe that the present administration has taken advantage of the 9/11 attacks in order to advance its own agenda, much of which has little or nothing to do with making America safer against terrorism. Rather, under the guise of being imperative to provide for "national security", this atmosphere of terror has provided the Bush administration with the unmitigated, albeit contrived, justification and ensuing authority (legally approved by Congress I might add) to employ the U.S. military to fortify and exploit American oil interests in the Middle East, get "revenge" against Saddam Hussein for the job that was left unfinished by Desert Storm (and the subsequent attempt on GHWB's life) and to manipulate domestic policy in order to restrict American civil liberties and increase presidential authority. However, to directly accuse Bush and his minions of "plotting" the events of 9/11 is totally without foundation in my estimation and, as a result, utterly ridiculous.