GREG PALAST: The CIA and Saudi Arabia, the Bushes and the Bin Ladens. Did their connections cause America to turn a blind eye to terrorism? UNNAMED MAN: There is a hidden agenda at the very highest levels of our government. PETER ELSNER: How can it be that the former President of the US and the current President of the US have business dealings with characters that need to be investigated? PALAST: In the eight weeks since the attacks, over 1,000 suspects and potential witnesses have been detained. Yet, just days after the hijackers took off from Boston aiming for the Twin Towers, a special charter flight out of the same airport whisked 11 members of Osama Bin Laden's family off to Saudi Arabia. That did not concern the White House. Their official line is that the Bin Ladens are above suspicion - apart from Osama, the black sheep, who they say hijacked the family name. That's fortunate for the Bush family and the Saudi royal household, whose links with the Bin Ladens could otherwise prove embarrassing. But Newsnight has obtained evidence that the FBI was on the trail of other members of the Bin Laden family for links to terrorist organisations before and after September 11th. This document is marked Secret". Case ID - 199-Eye WF 213 589. 199 is FBI code for case type. 9 would be murder. 65 would be espionage. 199 means national security. WF indicates Washington field office special agents were investigating ABL. ABL is Abdullah Bin Laden.