Detailed text transcripts for TV channel - CNN - 20110515:23:20:00
>> in the years after tora bora, bin laden seems to have vanished, appearing only in video messages that mysteriously materialize, but leave no trace of his whereabouts. general michael hayden headed up the cia at the time. >> for most of my time in office, i would even publicly say the trail was quite cold. we didn't have a lot of evidence in which we had much confidence. >> reporter: tough interrogations of al qaeda detainees, some at secret prisons, begin to provide the clues that will lead to a compound in pakistan, the mansion hideout of osama bin laden. >> we began to focus, drill down o...