Anger at lack of charges over Breonna Taylor killing

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Two police officers have been shot in the American city of Louisville during protests sparked by the lack of charges against the police officers who killed Breonna Taylor. She is one of the higest profile killings in the US at the hands of law enforcement officers, and a rallying cry for the Black Lives Matter movement. Can a contact tracing app, already in use in many countries, help the UK stem the new tide of covid cases? and the artist who's working on world's biggest painting in Dubai - it's the size of two football fields