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Robert Moore travels to some of the poorest and wealthiest pockets of America to ask what presidential candidates need to do to tackle the country's vast wealth inequality. Juliet Bremner is in India visiting the controversial Ghazipur landfill site - a 14-million tonne mountain of rubbish in a Delhi suburb blighting local communities. Steve Scott visits Japan ahead of the Tokyo 2020 Olympics to learn more about the quintessentially Japanese martial art of karate.

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ITV

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