Riot Police Clash with Demonstrators in Hamburg

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As world leaders fly in for the annual G20 summit in Hamburg activists have clashed with police. We speak to our correspondent in the city and a protestor. Earlier President Trump warned in a speech that the West faces an existential threat. We discuss with Thomas Wright, author of 'All Measures Short of War: The Contest for the 21st Century and the Future of American Power'; and the FT's Edward Luce, author of 'The Retreat of Western Liberalism'. Also: Was Amelia Earhart captured by the Japanese. And Paul O'Grady on the dating show Blind Date's first LGBT contestants. Picture: Protestors in Hamburg. Credit: Thomas Lohnes/ Getty.