khalid sheikh ahamed was chained in this position probably for three weeks.arious techniques are used as he describes to keep the prisoner awake. there are technical names for these in the cia documents in the department of justice documents, which methodically tell that these are legal. there is the use of those-- noise to reduce stress, the loud music which was limited to a certain decibel level but was played nonstop except when the interrogators were in the room. there is use of cold temperature adjustment to induce stress. the rooms were generally kept below if a two degrees and sometimes colder. the prisoner was make it. there was close observation to make sure that he did not turn blue. hypothermia did not again. but the idea was to keep them just above that level where hyperthermia would set in. and finally, cold water was used when the detainee reach the point where, despite the bright lights which were on 21st of day, the very loud music and the cold, still the prisoners would start to nod off in the guard would come forward and use cold water to ma