On 18 June 1940, Charles de Gaulle, then a little-known army officer, sat in a BBC studio in London and made his famous rallying call for the French to resist the Nazi occupation and its puppet Vichy government.In the eyes of the British prime minister Winston Churchill, De Gaulle was an arrogant, stubborn and defiant thorn in his and the allies’ side, but the Frenchman never stopped believing in the greatness of France and the need for resistance.Now a new two-part biopic, based on a biography of De Gaulle by a British author, has proved to be a surprise summer...