Interrogations that lasted for days on end. Detainees forced to stand on broken legs, or go 180 hours in a row without sleep. A prison so cold, one suspect essentially froze to death. The Senate Intelligence Committee is finally releasing its review of the CIA's detention and interrogation programs. And it is brutal.

Here are some of the most gruesome moments of detainee abuse from a summary of the report, obtained by The Daily Beast:

‘Well Worn’ Waterboards

The CIA has previously said that only three detainees were ever waterboarded: Khalid Sheikh Mohammed, Abu Zabaydah, and Abd Al Rahim al-Nashiri. But records uncovered by the Senate Intelligence Committee suggest there may have been more than three subjects. The Senate report describes a photograph of a “well worn” waterboard, surrounded by buckets of water, at a detention site where the CIA has claimed it never subjected a detainee to this procedure. In a meeting with the CIA in 2013, the agency was not able to explain the presence of this waterboard.