The story of Marlene Dietrich is the story of a tumultuous century.
Her dilemmas, temptations, career moves and loves came in a constant stream of totally unexpected twists and turns.
The mayor of the liberated town of Aachen met her at the head of the advancing column of American troops as the European war came to an end in 1945..
'Do you know who I am? she asked the mayor.
'Yes,' he replied, ' you are the blue angel.'
Perhaps she was.