operatives cal leighed sheikh mohammed and the information provided. >> the cause and effect relationship between the use of eit's and useful information subsequently provided by the detainee is in my view unknowable. >> the report had a fundamental flaw because they were never questioned. >> you lose the opportunity to really understand what was taking place at the time. >> the live news conference here at cia headquarters is undprentsed and reflects the impact of the senate reports on the agency and its mission. >> this is a feature i think of our past and one that we have to come to terms with and deal with. this agency is determined to move forward. >> while not offering specifics brennan said the revelations were damaging and reinforced the views among the american allies that we cannot be trusted. >> there are things that we do with partner services under our