Misprision of treason is an offence found in many common law jurisdictions around the world, having been inherited from English law. It is committed by someone who knows a treason is being or is about to be committed but does not report it to a proper authority. It is therefore unusual in that it is a criminal offence which may be committed through inaction.
http://en.wikipedia.org/wiki/Misprision_of_treason
The supposedly scientific NIST reports into the WTC collapses constitute a level of fraud, through heinous omissions, gross distortions and illogical argument, and appear designed to obscure evidence pointing to an Act of Treason occurring on 9/11/2001. Directors of such a reports should be held accountable for producing such a misleading and harmful document that obstructs efforts at seeking Justice for all the victims of the September 11 attacks.