US had access to all calls made in Afghanistan before 9-11

Guardian:

The US government shut down a series of court cases arising from a multimillion pound business dispute in order to conceal evidence of a damning intelligence failure shortly before the 9/11 attacks, MPs were told.

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Davis said that in 1998 the FBI seized upon an opportunity to eavesdrop on every landline and telephone call into and out of Afghanistan in a bid to build intelligence on the Taliban. The Bureau discovered that the Taliban regime had awarded a major telephone network contract to a joint US-UK venture, run by an American entrepreneur, Ehsanollah Bayat and two British businessmen, Stuart Bentham and Lord Michael Cecil.

"The plan was simple" Davis said. "Because the Taliban wanted American equipment for their new phone network, this would allow the FBI and NSA, the National Security Agency, to build extra circuits into all the equipment before it was flown out to Afghanistan for use. Once installed, these extra circuits would allow the FBI and NSA to record or listen live to every single landline and mobile phone call in Afghanistan. The FBI would know the time the call was made and its duration. They would know the caller's name, the number dialled, and even the caller's PIN."

But the plan, Operation Foxden, was delayed by a turf war, during which "the FBI and the CIA spent more than a year fighting over who should be in charge", he said.

The operation was eventually given the green light on 8 September 2001 - three days before the al-Qaida attacks. "A huge opportunity was missed," Davis said.

He added that when Bentham and Cecil sued Bayat in the New York courts, and Bayat lodged a legal claim against the two Britons, the case was struck out and all records removed from the courts public database on the grounds of State Secrets Privilege, a legal doctrine that permits the US government to shut down litigation on the grounds of national security. The Britons attempted to sue in London, Davis said, but the case failed because "so long is the reach of the American State Secrets Privilege" that they were prevented from discussing key details of the US case.

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The UK is looking at similar powers to shut down cases that involve state secrets.  It appears the wall of separation between the CIA and FBI prior to 9-11 caused us to miss an intelligence gathering opportunity.  It is not clear to me why the CIA was not in charge of an operation in Afghanistan at the time.