The leaders of the United States, France, Britain, Germany, Italy, Japan and Canada will come together to discuss major global challenges in France on Saturday at the annual meeting of the G-7 group of industrialized nations.As host, French President Emmanuel Macron, has made fighting inequality the theme of the summit, and has invited several other world leaders to attend. But Henry Ridgwell reports, any grand ambitions for the summit will likely be stymied by more pressing concerns.