The Senate Intelligence Committee has released a 6,000-page report on torture which is said to detail such extreme interrogation techniques as confinement in small places, sleep deprivation and waterboarding, which simulates drowning.
U.S. Senate Intelligence Committee Releases Torture Report

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Police officers stand vigilant outside the U.S. embassy in London as the Senate Intelligence Committee prepares to release a report on the CIA's anti-terrorism tactics, Dec. 9, 2014.

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Senate Intelligence Committee Chair Sen. Dianne Feinstein, D-Calif. is pursued by reporters as she arrives to release a report on the CIA's harsh interrogation techniques at secret overseas facilities, Washington, Dec. 9, 2014.

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Senate Intelligence Committee member, Sen. Angus King, I-Maine, during a TV interview, defends the Senate Intelligence Committee's before the release of a report on the CIA's harsh interrogation techniques on Capitol Hill in Washington, Dec. 9, 2014.

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Senate Intelligence Committee Chair Sen. Dianne Feinstein, D-Calif. is pursued by reporters as she arrives to release a report on the CIA's harsh interrogation techniques at secret overseas facilities, on Capitol Hill in Washington, Dec. 9, 2014.