If CIA was doing its job properly, the USIC wouldn't even need the ODNI, another post-9/11 GWOT creation.
SOCOM J2, DIA, FBI, NSA, and CIA all had different, relevant pieces of the puzzle before the 9/11 attacks.
The FBI was monitoring the al-Qaida flight students in the US and knew they spent their time concerned with navigation, not take-off, landing, or emergency procedures.
SOCOM J2 in Tampa has a computer program that linked the al-Qaida operatives. I can't recall the name of their program right now, but it was flashing RED in 2001.
DIA was aware that al-Qaida was conducting anti-US plots.
NSA was picking up signals of "something," but nothing concrete.
But CIA had HUMINT sources in Afghanistan that knew al-Qaida was preparing for a mega-attack somewhere. Al-Qaida failed with the Bojinka plot years before.
In the mujahadeen camps, the Pashtun Taliban fighters saw the al-Qaida posters looking for volunteers for a martyrdom mission. UBL requested mujahadeen for a "muscle team," amongst other requirements, like high IQ (to become flight students everyone learned later).
But the Pashtuns didn't anything to do with the pagal Arabs anymore, so they alerted Mullah Omar who then warned UBL not to conduct any external attacks from Afghanistan.
UBL married into Mullah Omar's family and he killed one of Mullah Omar's greatest enemies in the Northern Alliance just before 9/11, so he was "forgiven."
In the summer of 2001, CIA briefed "Dubya" via the PDB, alerting him that al-Qaida was "up to something," to which "Shrub" replied, "OK, got it." [sic]
Had CIA shared their precious intelligence in normal USIC traffic (M3 or WISE TS-SCI systems), the FBI might have detained the four flight students for interrogation before 9/11 and that PDB would have been more valuable:
"Good Morning, Mr President. CIA is aware that al-Qaida is preparing for a major attack against the United States of America. Their previous American target was the WTC in NYC in 1993 and a suicide airline attack plot in Asia which the Philippines security services interrupted. FBI is aware that four suspected al-Qaida operatives are flight students in Texas and Florida. These four flight students have since been detained and are being interrogated by the FBI. CIA and FBI will keep you apprised of any information they uncover."
"OK, got it." [sic]
The 9/11 Commission Report covered all this and suggested an overseer for CIA and all USIC agencies to share data with each other, hence the "bloated" ODNI.
ODNI, DHS, and ICE-- post-9/11 monstrosities, must all go on 20 Jan 2029.
The threads are easier to follow, for me, anyway, without all the full blown youtube pages and multiple such posts that several posters use.
But that's just me.