A respectable investigation would allow for the thorough questioning of the Bush administration and those officials responsible for protecting the nation as of Sept. 11th without the unconscionable protections from honesty demanded by them at the time. A respectable investigation would seek to ascertain what specific failures allowed the event to take place, what specific parties were responsible for those failures, and would thoroughly investigate those parties to make absolute certain, before taking whatever punitive or legal action is called for, that they were in error/neglect and not in collusion. A respectable investigation would ascertain the chain of command where the decision to destroy the WTC 7 evidence was involved, and thoroughly question those individuals who made the call as to their motivations, while holding them responsible at least for the obstruction of justice regardless of their response. A respectable investigation would invest time and resources into ascertaining precisely who funded the attacks, and who if anyone assisted the hijackers in entering the United States, as opposed to concluding these issues of 'are little real practical significance'. A respectable investigation would explore the previous inexplicably cancelled efforts to track the 'insider trading' which took place on 9/11, and resume such efforts with the identification of individuals in mind. Once identified, those individuals should be questioned as to how and why they predictively bet against those companies to be wounded in the attacks. First and foremost, a respectable investigation would address the concerns of those suspicious of the nature of the unprecedented and baffling triple-collapse seriously, investigating every possible impetus for such an uncanny event instead of concocting, apparently with great difficulty and a number of errors/omissions, plausible scenarios which fit the explanation composed long before any examination of the evidence had commenced.
I could go on like this for a while, but might as well leave it at that for now.