Sure.  Just as slim as our trusting obvious forgeries about Niger as an excuse for war and then destroying the career of a covert agent who was related to the guy who investigated te forgery.  WAIT!  That happened!    Seriously, not as cut and dry as you think.  There were fire chiefs who DIDN'T think bldgs were going to collapse as well.  Many 911 victims think a better investigation is still in order, as do I.