Nigeria SARS protests: reports of military firing on crowd

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Witnesses say armed and uniformed men stopped ambulances from helping the wounded - and that CCTV cameras were taken down just before the military started shooting. A nurse in Argentina talks about her work helping patients with Covid, as the country records more than a million cases. And a space probe successfully sucks up samples of rocks and dust, which could reveal how our sun and solar system came into being billions of years ago.