It's important to note that the dunkings described are not the same as waterboarding, a technique in which a suspect's face is covered and water is poured over him to evoke a sensation of drowning.

What the torture told us: It is unclear, but the Senate report indicates both that the torture continued "even after it appeared that Baluchi was cooperating," and that his attorneys indicate he "suffered head trauma while in CIA custody."

Hassan Ghul

Who he is: An al Qaeda member who is generally credited with having provided the key piece of information allowing the CIA to identify the location of Osama bin Laden. Ghul is understood to have provided the basis for the first torture scene in Zero Dark Thirty.

How he was tortured: It isn't clear. As The Wire noted on Monday, Ghul appears to be the person California Sen. Dianne Feinstein referred to when she said that a detainee provided relevant information "the day before he was subjected to harsh CIA interrogation."

What the torture told us: The key detail about the identity of bin Laden's courier was given in response to a question from Kurdish authorities who questioned him prior to his being turned over to a secret CIA prison in Romania, the Post reports. He was killed by a drone in 2002.

Khalid Sheikh Mohammed

Who he is: The architect of September 11th, according to the 9/11 Commission.

How he was tortured: Mohammed is one of the three terror suspects the CIA admits waterboarding. A 2009 Times article indicates that it happened 183 times. He became so expert at the practice that he figured out it could only last 10 seconds, and would count off the timing on his fingers.

What the torture told us: Nothing helpful in catching bin Laden. "Mohammed only discussed [the courier] months after being waterboarded, while he was under standard interrogation," sources told AP.

Abd al-Rahim al-Nashiri

Who he is: The alleged mastermind of the attack on the U.S.S. Cole in 2000.

How he was tortured: Waterboarding.

What the torture told us: Not clear, though the sources who spoke with the Post indicate that it continued even after he agreed to cooperate.

Abu Zubaida, a.k.a. Zayn al-Abidin Muhammed Hussein

Who he is: According to the CIA, a senior al Qaeda operative, necessitating his torture. "[E]xperts later determined that he was essentially a facilitator who helped guide recruits to al-Qaeda training camps," the Post reports.

How he was tortured: Waterboarding. In August of 2002, he was waterboarded 83 times according to a Justice Department memo reported by the Times.

What the torture told us: The Post: "One official said that almost all of the critical threat-related information from Abu Zubaida was obtained during the period when he was questioned by Soufan at a hospital in Pakistan, well before he was interrogated by the CIA."