The CIA released a DCI (Director of Central Intelligence) Terrorist Threat Review on July 3, 2001. It mentioned ‘ongoing operational planning’ by al-Qa’ida, and read: “Attack Threat Real -In late stages on [the Arabian] Peninsula [redacted] -Multiple attacks likely -Mass casualty bomb -Probable MO against U.S. facilities.” In summation, it read: “-Multiple attack preps in late stages or complete -Attack decision made -They’re waiting us out…looking for a vulnerability -Can expect little additional warning.”
– CIA, “DCI Update Terrorist Threat Review,” (CIA), The Central Intelligence Agency’s 9/11 File:, The National Security Archive, July 3, 2001