On April 14th, the senior counsel to the 9/11 Commission - John Farmer - will publish a book called The Ground Truth: The Story Behind America's Defense on 9/11.
The book has not yet been released, and I'm not sure what Farmer will say. But here is a quote available on Amazon:
At some level of the government, at some point in time...there was an agreement not to tell the truth about what happened.
Farmer's publisher, Houghton Mifflin Harcourt, says of the book:
Farmer builds the inescapably convincing case that the official version not only is almost entirely untrue but serves to create a false impression of order and security.
Farmer has previously said:
I was shocked at how different the truth was from the way it was described .... The [Norad air defense] tapes told a radically different story from what had been told to us and the public for two years.... This is not spin. This is not true.