First, the documents now on this web site are the source documents that come from the US government. The account of FBI Agent Ali Soufan is an account dictated to Lawrence Wright by FBI Special Agent Steven Bongardt, Soufan’s assistant on the Cole bombing. All of the information in this account of Ali Soufan was vetted by John Miller, information officer at the FBI. So this account can be considered to be the official FBI record of the interaction between Soufan, his Cole bombing investigating team, and the CIA and FBI HQ prior to the attacks on 9/11.
This information conclusively demonstrates that the CIA had not only criminally obstructed the FBI investigation of the USS Cole many times, but then they had criminally sabotaged any chance FBI Agent Steven Bongardt would have to be able to investigate and find Mihdhar and Hazmi in time, when he was told that both Mihdhar and Hazmi were in the US and knew they were going to take part in a horrific al Qaeda attack that would kill thousands of Americans.
Verifying documentation: Did the CIA prevent the FBI from preventing 9-11? by Lawrence Wright
See the book "Prior Knowledge of 9/11" for more in depth information on this.