CIA attempted to recruit 9/11 hijackers al-Hazimi and al-Mihdhar, used their liaison relationship with Saudi Intelligence Services to circumvent legal restrictions on CIA operations on US soil, brought them into the US without disclosing to the FBI, lost track of them, scrambled to find them, eventually found them when the twin towers came down in NYC.
Canestraro Declaration, July, 20 2021, unredacted.