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UNCLASSIFIED Abu Zubaydah and used hand-cuffs and leg shackles to maintain control. In addition, either loud rock music was played or noise generators were used to enhance Abu Zubaydah's "sense of hopelessness." Abu Zubaydah was typically kept naked and sleep deprived.

(TS////NF) An April 16, 2002, cable explained that the interrogation strategy had shifted since Abu Zubaydah's medical condition prevented "total isolation as originally planned." According to the cable, a 24-hour interrogation strategy was now "deemed to be the best approach" for acquiring information. As a result, the FBI officers were once again allowed to question Abu Zubaydah. On April 17, 2002, an FBI officer met with Abu Zubaydah for six hours. FBI records state that Abu Zubaydah had "not seen the interviewing (FBI) agent" since April 11, 2002, but that Abu Zubaydah greeted the agent by name. During the questioning Abu Zubaydah denied any knowledge related to specific targets for a pending attack and "advised that many of the brothers on the front lines (nfi) [no further information] talked about all types of attacks against America but that for the most part this was usually just talk and that [the United States] should not be concerned about this type of talk." Abu Zubaydah provided information on al-Qa'ida, KSM, his past travel to the United States, as well as general information on extremists in Pakistan.

(TS////NF) Abu Zubaydah continued to provide information to interrogators throughout April 2002, but not information on pending attacks against the United States. On the evening of April 20, 2002, Abu Zubaydah told the FBI officers about two men who approached him with a plan to detonate a uranium-based explosive device in the United States. Abu Zubaydah stated he did not believe the plan was viable and did not know the names of the two individuals, but provided physical descriptions of the pair. This information was acquired after Abu Zubaydah was confronted with emails indicating that he had sent the two individuals to KSM. The CIA would later represent that this information was acquired "as a result" of the use of the CIA's enhanced interrogation techniques, and that the information acquired resulted in Page 29 of 499 UNCLASSIFIED