It's strange, though, that their attempt at falsification of the 5 frames was so lame that they almost seemed to want to invite suspicion about why there is nothing resembling a large plane in any of the frames. What's your theory as to why they didn't at least try to make it look like a large plane hit the Pentagon in the faked frames?

"While I have no evidence that the CIT witnesses are acting, neither can I easily dismiss the possibility."

Are you saying that you don't feel it is possible to figure out whether or not the CIT witnesses are legitimate, or are you arguing more along the lines that since there is always at least a small possibility, however miniscule it may be, that all the witnesses could be wrong or acting (lying), that witness testimony can never compete with physical evidence and is therefore never good enough to draw any conclusions?

First of all, in criminal investigations physical evidence usually trumps witness testimony, IF it is a) readily available, and b) not planted. Otherwise, witness testimony can become the strongest evidence. In that regard, the process of Assessing the Credibility of Witnesses is an often crucial step in the criminal investigation. More weight is given to witnesses who are: a) verified and credible (consistent and specific and reasonable), b) not a suspect in the crime, c) do not have some conflict of interest in which what they are claiming merely matches what would be expected or predicted to be in their interest to protect themselves or derive some significant benefit from, and d) corroborated and not contradicted by other credible witnesses.

Based on what I've observed regarding the methods CIT used in following up witnesses, many of whom were initially quoted in media-mined snippets immediately after the event, and verifying their whereabouts and other aspects that have significant bearing on their credibility, I'm pretty comfortable with being able to judge whether or not they are legitimate or not. I would think that to just dismiss them as "possibly actors" or "I have no idea" in this situation may be passing the buck too fast. I think it is our responsibility to parse this information and at least try to determine for ourselves if these witnesses are credible or not, because a large body of corroborated witness statements can serve as crucial evidence.