Stars mark Mandela's birthday

Celebrations have taken place in South Africa and the United States to mark the 91st birthday of former South African president Nelson Mandela.

In New York, a star-studded concert featured performances from Stevie Wonder, Cyndi Lauper and Carla Bruni, as well as a birthday tribute from President Obama.

But in a message played at the event, Mr Mandela explained that the first annual 'Mandela Day' was not a holiday, but "a day devoted to service".

Dani Sinha reports.