The United States tortured al Qaeda detainees captured after the September 11, 2001 attacks, President Obama has acknowledged.
"We tortured some folks," Obama said at a televised news conference at the White House. "We did some things that were contrary to our values."
Addressing the impending release of a Senate report that criticises CIA treatment of detainees, Obama said he believed the mistreatment happened because of the pressure national security officials felt to forestall another attack.
He said Americans should not be too "sanctimonious," about passing judgment through the lense of a seemingly safer present day.
That posture, which he expressed as a candidate for national office in 2008 and early in his presidency, explains why Obama did not push to pursue criminal charges against the Bush era officials who carried out the CIA program. To this day, many of those officials insist that what they did was not torture, which is a felony under US law.
Still, Obama's remarks on were more emphatic than his previous comments on the subject, including a 2009 speech in which he trumpeted his ban of "so-called enhanced interrogation techniques," and "brutal methods," but did not flatly say the US has engaged in torture.
"I believe that waterboarding was torture and, whatever legal rationales were used, it was a mistake," he said in April 2009.
Obama did not address two other central arguments of the soon-to-be-released Senate report - that the brutal interrogations didn't produce life-saving intelligence, and that the CIA lied to other elements of the US government about exactly what it was doing.
The president also expressed confidence in his CIA director, John Brennan, in the wake of an internal CIA report documenting that the spy agency improperly accessed Senate computers. There have been calls for his resignation by congressional lawmakers.