Toll rising from bullets that rain down on Rio "Businesses and schools in the line of fire have been shuttered. Thousands of children are staying home. Even air travel is affected — domestic jet routes were diverted from Rio's downtown airport when shooting flared up in a slum near Copacabana beach that the planes had to fly over." Internal disintegration Today's megacities in developing countires, such as Johannesburg, Rio de Janeiro and Mexico City may be found to be ungovernable as we move towards a dark age. Meanwhile, expect security measures to be tightened continuously in western cities.