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Republicans in the United States have begun their national convention with dire warnings about the country's future if Joe Biden were to defeat Donald Trump in November's presidential poll. Speakers claimed Mr Biden would be a radically left-wing leader.

Police in the US city of Kenosha have fired tear gas to disperse protesters who defied an overnight curfew. Hundreds had gathered outside the county courthouse as darkness fell.

Later today Africa will be certified as free from the wild polio virus - which is a massive milestone in the fight against the disease. The battle has taken 15 years and leaves only Pakistan and Afghanistan as countries where the disease is still in circulation.