Questioning actions taken by American intelligence agencies prior to 9/11, this investigation charges that the CIA and NSA repeatedly and deliberately withheld information from the FBI, thereby allowing hijackers to attack the World Trade Center and the Pentagon. Pinpointing a CIA deputy unit chief, Tom Wilshire, and his manager, Richard Blee, as being primarily responsible for many of the intelligence failures, this account analyzes the circumstances in which critical intelligence information was kept from FBI investigators in the wider context of the CIA's operations against al-Qaeda, concluding that the information was intentionally omitted in order to allow an al-Qaeda attack to go forward against the United States. The book also looks at the findings of the four main 9/11 investigations, claiming they omitted key facts and were blind to the purposefulness of the wrongdoing they investigated. Additionally, it asserts that Blee was involved in key post-9/11 events and further intelligence failures, including the failure to capture Osama bin Laden at Tora Bora and the CIA's rendition and torture program.