Survivors can be found in Miami rubble, says Biden

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US President Joe Biden has been meeting families of people who died or are missing after the collapse of an apartment block last week. The billionaires' commercial Space race is heating up. Richard Branson has announced he will head to space in just over a week - just before his rival Jeff Bezos. And we hear about the mangrove forests protecting livelihoods and the environment on the Kenyan coast.