May 1940: Madame van Swinderen points out London barrage balloons to Princess Juliana of the Netherlands pushing a pram and her young daughter Princess Beatrix. (Photo by A. Cook/London Express/Getty Images)
May 1940: Madame van Swinderen points out London barrage balloons to Princess Juliana of the Netherlands pushing a pram and her young daughter Princess Beatrix. (Photo by A. Cook/London Express/Getty Images)