Enrique Pena Nieto inaugurated as Mexico's president
2 December 2012 Last updated at 03:00 GMT
Enrique Pena Nieto has been sworn in as Mexico's new president, promising to boost economic growth and tackle drug-related violence.
Security was tight in Mexico City for the inauguration after petrol bomb-wielding protesters clashed with riot police, who fired tear gas.
The demonstrators are angry at what they say was vote-buying by the president's campaign, and against the return to power of Mr Pena Nieto's Institutional Revolutionary Party (PRI) after a 12-year absence.
Will Grant reports.