war, had begun his own quest for the bomb. >> it never occurred to kim il-song that north korea should not have nuclear weapons. >> by the 1980s, kim il-song began turning over some of his duties to son, kim jong-il. father and son were vastly different characters. >> you could talk to certain migrants from north korea that live in the south. they'll tell you that kim il-song we loved. kim jong-il terrified us. >> introverted. >> kim jong-il is a complicated person. he was prone to mood swings. >> in 1994, kim il-song died. there were doubts about kim jong-il's succession but they gradually faded because he had one talent. he was a master propagandist. >> when kim jong-il took charge