SAO PAULO — Brazil’s federal police indicted 20 people Friday for rock salt mining in the northeastern coastal city of Maceio that destroyed five urban neighborhoods and forced tens of thousands of people to leave their homes. The alleged crimes include damage to public property and environmental crimes. A police source, who spoke on the condition of anonymity, confirmed to The Associated Press that those indicted were employees or contractors of Braskem, one of the biggest petrochemical companies in the Americas. Braskem is owned primarily by Brazilian state-run oil company Petrobras and construction giant Novonor, formerly known as Odebrecht. It