I've often wondered about why she went to Hanoi in 1971.
Did she believe in her cause or was she rebelling against her father? The direction her life took after Henry Fonda died suggests the later. Henry Fonda was an amalgamation of Dutch and Italian from the American Midwest. He was, along with Humphrey Bogart, the greatest actor of his generation. He also was very humble and believed in duty to country over the pursuit of happiness. He drove an ambulance during WW II in Italy and got an honourable discharge in the winter of 44. He became aloof and cold to his children after the war, but in spite of that became America's Dad as he aged.
Sergio Leone kept the identity of Frank a secret, when the film was premiered audiences lost it when they found out who frank was.