Ten people have been killed after part of a cliff collapsed onto leisure boats on a Brazilian lake. Another 32 were injured in the accident in the south-east of the country. Video circulating online shows the moment the rock detaches from the cliff face as onlookers try to yell warnings to the boats beneath. At least one of the boats appears to have sunk, while others managed to escape from the huge wave the falling rock created. The collapse at 11:00 local time (14:00 GMT) followed days of rain in Minas Gerais state, which had made the cliffs more susceptible...