Celebrations clash with social tensions in Mexico on the eve of the World Cup

Escalating protests and social tensions in Mexico's capital threaten to derail FIFA World Cup celebrations on the eve of the opening ceremony as protesters effectively block off access to the plaza set to host the country's main fan celebrations. Mexico jointly hosts the soccer tournament with the US and Canada and kicks off festivities Thursday with a star-studded event, even as some critics say the government has spent too much time and money catering to international visitors at residents' expense.