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Bill De Blasio sworn in as mayor of New York City

1 January 2014 Last updated at 21:10 GMT

The first Democratic mayor of New York City in more than 20 years has taken his oath of office at City Hall where he pledged to pursue a liberal agenda.

Bill de Blasio, who succeeds billionaire Michael Bloomberg, was inaugurated at a ceremony presided over by former US President Bill Clinton.

Philippa Thomas reports.