sign a nuclear test ban treaty. >> the keynote of cordiality established at the very first meeting -- >> and kennedy really believes in it. he believed in it from the day he became president. >> his move towards nuclear disarmament is a political triumph. but for jack, a more personal drama is unfolding. jackie is in cape cod, and she is eight months pregnant. >> the president was in washington then, the first week in august, when he got urgent word from cape cod that she had gone into an early labor. >> jackie gives birth to a boy, patrick. >> he said on the way, "i'm never there when she needs me." and the president arrives, the baby has been born by cesarean. but because he is so premature, it suffers from a lung ailment.