this is bbc news. a teenager is under arrested in connection with the deaths of two people in wisconsin. disturbing video shows a white man firing at a crowd of black lives matter protesters. a local sherrif says vigila ntes and militias were patrolling the streets. if they were trying to stir up trouble, they succeeded. whether you like it or not, you always know what he's thinking. and that is because he's an authentic person who loves this country and its people. also in the programme... 40% of those infected with covid—19 pass spread the virus without knowing they have got it.

so why is the cdc in america telling people who think they may have it, they no longer need to be tested? and the lucky palaeontologist from scotland who stumbled upon a dinosaur fossil while jogging along a beach. hello, i'm katty kay in washington. christian fraser is in london. it is still far from clear what happened last night in the town of kenosha in wisconsin. what we do know is that a teenager is underarrest in the neighbouring state of illinois in connection with the deaths of two people. video from the night shows a young white manjogging through a crowd of protestors. he's armed with a long gun. he stumbles and shoots into the crowd. this was the third night of protests in kenosha after yet another police shooting of a black man. there was violence, fires,

looting on the first two nights. but last night they took a different turn — with what looks like armed gunmen stirring up unrest. the state's lieutenant governor says the shootings aren't surprising and white militias have been ignored for too long. our correspondent aleem maqbool is in kenosha and has this report on tuesday night's violence . warning, his report contains pictures you find disturbing.