dr. swiread been to libya many times before. when was your first trip to tripoli? >> about two weeks after they issued the indictments against the two libyans. >> dornstein: back in 1991, dr. swire came here to meet face to face with the libyan leader, moammar qaddafi. over the years, swire worked hard to persuade qaddafi to turn over the suspects, so the evidence could finally be heard in a proper court. >> abdel basset ali al megrahi was convicted of 270 counts of murder. >> dornstein: but during the course of the resulting trial, swire says he became troubled by key elements of the prosecution case. the judges had found weaknesses in the identification of megrahi as the man who bought the clothes wrapped around the bomb. and swire believed the prosecution had failed to prove the route that the bomb bag had taken to get onto flight 103. and then there were deep questions that swire and others would raise about the legitimacy of the key piece of physical evidence in the case, which they suspec

i walked dr. swire through the trail of papers that led me to the man i believed to be the lockerbie bomb expert. abu agela mas'ud. and i tried to explain how this bomb expert-- abu agela mas'ud-- was tied to the man whose innocence dr. swire has been fighting for over the years. so, megrahi is traveling with this person abu agela mas'ud before the bombing, and it's hard for me to imagine megrahi himself wasn't involved. >> mm-hmm. >> dornstein: this person is a known bomb expert traveling with megrahi the day of lockerbie. >> mmm. >> dornstein: if this story that i'm putting together here were true, it would challenge a lot of what you have come to believe. >> mmm. i don't know what to make of that. but, on the other hand, i'm not the sort of guy who wants to sit around and watch this sort of thing dismissed as not worth pursuing simply because it doesn't match what we think we know. buyou've got to take it to the next step, i'm afraid. great to see you. >> dornstein: thank you. terrific. over the cour