KEY POINTS:
Newly declassified intelligence documents reveal the depth of US officials' concern that Pakistan was providing funds, arms - and even combat troops - to the Taleban regime in Afghanistan for years before September 11.
They also show rising frustration at what US officials called Pakistan's "resistance and/or duplicity" toward Washington's repeated requests for help in getting the Taleban to hand over Osama bin Laden.
The documents, released under a Freedom of Information Act request by George Washington University's National Security Archive and posted on its website, add detail to what is already generally known about US intelligence on Pakistan's links with the Taleban as it surged to power in Afghanistan in the mid-1990s.
They show that as early as 1994, the US believed Pakistan intelligence services were involved with the Taleban.
