Rio de Janeiro

Drug traffickers shot down a police helicopter in Rio de Janeiro during a gunbattle between rival gangs Saturday, killing two officers and injuring four just two weeks after the city was chosen to host the 2016 Olympic Games. Ten suspected drug traffickers were also killed during the fighting in a shantytown, officials said. Bullets flying from the Morro dos Macacos ("Monkey Hill" in Portuguese) slum in northern Rio de Janeiro tore into the...