it is feller's investigation try to find concrete evidence that hirohito had direct responsibility for the decision to attack pearl harbor. it's hard to imagine a scenario where the emperor of the country may not have that information or may not be the one making that decision but that is how things were structured in the japanese government at the time. it was possible. he goes on this very intense and fills an enormous responsibility and understands because of what he knows about japan, that if he ultimately has to make a recommendation that hirohito be removed, be put on trial, and the emperorship to be removed, the chaos and what it would do to the fabric of the japanese people would be devastating, and would work against what he knew would be the efforts of the united states government to help rebuild japan and be a major force in that rebuilding for the first five to seven years. tavis: how did this to the extent that it did, i do not know but i will ask. how did your going back to read this history impact to your thinking about our dropping the bomb? >> i sort of developed my ow