The London riots and looting this weekend were among the worst civil disturbances Britain has seen in a quarter-century. Some blamed government spending cuts for sowing unrest and weakening police.
London riots: Groups of masked and hooded young people looted shops, attacked police officers and set fire to vehicles in violence that has raised questions about security ahead of the 2012 Olympics and revealed pent-up anger against the city's police.
In an age of global commerce and culture, boom cities include Shanghai, China, and Mumbai as well as Istanbul, Turkey, and São Paulo, Brazil.
Outspoken conservative Boris Johnson leads 'Red' Ken Livingstone in the polls.