One year after their protests overshadowed the Confederations Cup, Brazilian authorities see the Black Bloc group of masked demonstrators as one of the main security threats to the World Cup, Rio de Janeiro, June 10, 2014. Duration: 02:06
One year after their protests overshadowed the Confederations Cup, Brazilian authorities see the Black Bloc group of masked demonstrators as one of the main security threats to the World Cup, Rio de Janeiro, June 10, 2014. Duration: 02:06