The FBI's Office Of The Inspector General Report On Restrictions On The Flow Of Info Within The FBI

I read from the FBI's Office of the Inspector General (OIG) report which was publicly released in June 2006. In this section of the chapter, during the summer of 2001, the effect of the various restrictions within the FBI on information sharing – commonly referred to as “the wall” – had resulted in a nearly complete separation of intelligence and criminal investigations within the FBI regarding any information pertaining to Khalid al-Mihdhar and Nawaf al-Hazmi.

A Review of the FBI's Handling of Intelligence Information Related to the September 11 Attacks: Chapter Three, Section 4: (Restrictions On The Flow Of Information Within The FBI)