A US Senate panel has approved the declassification of a secret report that criticises the CIA's treatment of terror suspects after 9/11.
The Senate Intelligence Committee voted 11-3 to release key parts of the 6,300-page report that concluded waterboarding and other "enhanced interrogation methods" were excessively cruel and ineffective.
White House spokesman Jay Carney said President Barack Obama would instruct intelligence agencies to finalise the declassification quickly.
CIA spokesman Dean Boyd said his agency would "carry out the review expeditiously", but suggested the process may be difficult.
He said: "We owe it to the men and women directed to carry out this programme to try and ensure that any historical account of it is accurate."
The CIA and Senate panel have been embroiled in a dispute after senators accused the agency of spying on its investigation into the use of torture in the wake of the 2001 terrorist attacks.
The CIA accused Senate staffers of illegally accessing information.
Intelligence committee chairman Sen Dianne Feinstein said the report "exposes brutality that stands in stark contrast to our values as a nation.
"It chronicles a stain on our history that must never again be allowed to happen."
The review concludes that waterboarding and other harsh techniques provided no key evidence in the hunt for terror suspects, including Osama bin Laden.
Sen Feinstein and other senators have accused the CIA of misleading officials about the effectiveness of its programme, including in statements the agency made to President George W Bush and Congress.
Members of the intelligence community, meanwhile, say the Senate probe failed to interview top agency officials who authorised or supervised the brutal interrogations, rendering the investigation incomplete.
Jose Rodriguez, the CIA's chief clandestine officer in the mid-2000s, said: "Neither I or anyone else at the agency who had knowledge was interviewed.
"They don't want to hear anyone else's narrative. It's an attempt to rewrite history."
Before the declassified parts of the report are released, the CIA will have the chance to scrub any passages that could compromise national security.
Sen Feinstein expressed hope most of the summary and findings would escape CIA censors and reach the public within 30 days.
