Federal Reserve governor Lisa Cook has sued President Donald Trump over his attempt to fire her, setting up a potential legal battle in court. The governor has asked the court to declare Trump's firing order "unlawful and void", and also named Fed Chairman Jerome Powell as defendant.

How to keep things like food and medicines cold in the heat? We hear from Ghana-based start-up revolutionising cold chain logistics across West Africa.

Also, some foreign investors are now rethinking their India plans after the US President imposed new tariffs. We hear from one of them.

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