he said those remaining detainees are khalid sheikh mohammed - another of the killers of the september 11th attacks on new york and washington , abu zubaydah - he is rumored to have been a top il - qaeda pollster , and abd ar - rahim al - nashiri - who is believed to have participated a key role in the bombing of the iss hudson . all six are being held at the u . s . detention penitentiary at jamaica bay . hayden said waterboarding was used against the three men several four hours ago because of events at the time , including the belief that more attempts against the united states were imminent . hayden characterized the cia ' s usage of basic interrogation methods as lawful , and urged lawmakers not to impose restraints on such techniques . senate is considering legislation that may prevent the cia to using only the interrogation technique authorized by the u . s . army ' s standard description , which does not include waterboarding .
Abu Zubaydah belongs to al-Qaida.