I read from the FBI's Office of the Inspector General (OIG) report which was publicly released in June 2006. This section of the report concentrates on the intelligence community data which the IG report puts in chronological order before the September 11th 2001 terrorist attacks. There are eight major data points reported by the IG, including the first cable regarding al-Mihdhar in Malaysia, the discussion between CIA and FBI employees about Malaysia meetings, cables regarding al-Hazmi’s travel to the United States and the OIG findings regarding the FBI’s knowledge about Khalid al-Mihdhar and the Malaysia summit meetings held by major Al Qaeda leadership and their affiliate, Jemmah Islamiyyah, which are a Salafist group based in Indonesia. The FBI OIG found that the CIA did not share significant pieces of this information with the FBI and that al-Mihdhar had a U.S. visa and that al-Hazmi had traveled to Los Angeles.

A Review of the FBI's Handling of Intelligence Information Related to the September 11 Attacks: Chapter Five, Part Three (Factual chronology regarding Hazmi and Mihdhar)

https://oig.justice.gov/sites/default/files/archive/special/s0606/chapter5.htm#IIB1