We've waterboarded before:

http://blog.buzzflash.com/contributors/1416

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HISTORY OF WATER TORTURE

The use of water to simulate drowning has been used as a torture device since at least the Middle Ages. It was known as the tortura del agua during the Spanish Inquisition and was used by agents of the Dutch East India Company during the Amboyna massacre in 1623.

Water torture has been acknowledged by the United States to be illegal since at least 1901 when an Army officer was convicted and sentenced to 10 years imprisonment for using it to torture a Philippine rebel.

In 1947, a Japanese officer was prosecuted by the United States for strapping a U.S. civilian to a tilted stretcher and pouring water over his face until he agreed to talk. The officer was convicted of a Violation of the Laws and Customs of War and was sentenced to 15 years of hard labor.

In 1957, French forces in Algeria tortured journalist Henri Alleg by strapping him to a plank and wrapping his head in a cloth placed under a running water tap. Alleg later talked about his torture in The Question: "The rag was soaked rapidly. Water flowed everywhere: in my mouth, in my nose, all over my face. But for a while I could still breathe in some small gulps of air. I tried, by contracting my throat, to take in as little water as possible and to resist suffocation by keeping air in my lungs for as long as I could. But I couldn't hold on for more than a few moments. I had the impression of drowning, and a terrible agony, that of death itself, took possession of me. In spite of myself, all the muscles of my body struggled uselessly to save me from suffocation. In spite of myself, the fingers of both my hands shook uncontrollably."


(Image not included in excerpted article. Source: http://waterboarding.org/node/19)
In 1968, The Washington Post published a photograph of an American soldier supervising the use of water torture on a North Vietnamese prisoner. The victim was being held down as water was poured over a cloth covering his nose and mouth to induce "a flooding sense of suffocation and drowning meant to make him talk." The soldier was charged, convicted, and discharged from the Army.

In 2005, the U.S. State Department's review of Tunisia's poor human rights record included "submersion of the head in water" as a form of "torture and other cruel, inhuman, or degrading treatment or punishment" of detainees.

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