Nick Terry
Illuminator
It unfortunately happens enough to be a 'real thing' -- not necessarily "the opposite" (which has been trademarked by the right-wing with President Obama) but the fact is, the government does indeed lie its ass off whenever the need arises -- see D.N.I. Clapper committing perjury. Or if you want an older example, look at former C.I.A. Director Richard Helms. He perjured himself too. As did President Reagan with Iran-Contra. President George H.W. Bush about taxes (Read my lips). President Clinton about having an extramarital affair in the Oval Office no less. But these lies are unimportant, right?
On the contrary, those lies were so important they were exposed and discussed publicly.
"The government" is subject to multiple checks and balances, starting with the fact that US politics is structured around an adversarial system. It is always potentially in the interests of the party in opposition to attack the party in government, hold committee hearings, and so on.
Then there's the media, both national and international, who have a vested interest in exposing malfeasance in government, because it makes good copy. Journalists are also best placed to write the first books on any subject, and do so constantly.
In cases involving serious malfeasance, then the courts are involved, leaving written records, even if not all verdicts are what everyone might like.
Finally, we have academia,who don't necessarily break all the stories themselves, but who act as a kind of court assessing these matters by way of arriving at an eventual consensus, and settling them down to become accepted historical facts.
Iran-Contra is a great example. The story first broke in a Lebanese news magazine in early November 1986 and was rapidly transmitted worldwide including back to the US. Reagan announced a special review board by the end of November 1986, which reported back in February 1987 having interviewed 80 witnesses and produced 200 pages of criticism of government officials. Several officials resigned or were fired within weeks of the scandal breaking.
Separately, the Democratic-controlled Congress held hearings in 1987. The controversy led eventually to the trial of Oliver North, who was initially convicted before the appeal stage reversed the convictions for legitimate procedural considerations caused by his earlier testimony to Congress.
Bob Woodward separately published a book on 'The Secret Wars of the CIA 1981-1987' in 1987, which became a best-seller. Since then, many other authors and academics have chronicled and documented he Iran-Contra affair, which is now a firm part of history.
9/11, too, is a firm part of history. Journalists and academics independent of government have written extensively on al Qaeda, utilising al Qaeda and jihadist sources alongside sources generated by the US and other foreign governments. Journalists and academics have written extensively on the decision to invade Iraq and the consequences of the 2003 war.
The question, therefore, is whether you have ever bothered to read a book on 9/11 written by a reputable author.