If one reads carefully The Devil's Chessboard along with James Douglass's superb book, JFK and the Unspeakable, the reader will come away with a deeper understanding of the "crime of the century" that synthesizes the most relevant details that 50 years of scholarship and investigation have provided.
What bin Laden grasped before 9/11: with a relatively small number of followers, he and his movement couldn't hope to create the world of their fervid dreams. If, however, he could lure the planet's "sole superpower" into stepping into his universe, military first, it would change everything and so do his work for him.
The "security vs. liberty" strawman argument remains the rhetorical weapon of choice for National Security State officials terrified by the spread of public encryption technologies. They argue that, absent some form of technological "back door" to break into private encrypted communications, federal law enforcement and intelligence agencies will be blinded, unable to fend off potential terrorist attacks here at home.
Generally speaking, its powers and prerogatives remain beyond constraint by that third branch of government, the non-secret judiciary. It is deferred to with remarkable frequency by the executive branch and, with the rarest of exceptions, it has been supported handsomely with much obeisance and few doubts by Congress.