Has RFK Jr declared a war on science?

Why has America's health secretary RFK Jr fired the head of America's public health body? He says she was taking the Centres for Disease Control and Prevention in the wrong direction. She and her colleagues - who have resigned in protest - say they were uncomfortable following an anti-vax, anti-science direction of travel. Where will the MAHA project leave Americans? Will vaccines dry up? And does it even have Trump's support? We speak to Dr Mandy Cohen, who led the CDC until Trump's inauguration in January.

Later, federal troops are coming onto Chicago's streets - a city described as a "hellhole" by the President despite having a lower murder rate than several cities governed by Republicans. Is Trump trying to create a private army under his control?

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