Obama, David Cameron & more gather for Nelson Mandela’s memorial service in South Africa

Tens of thousands of people including world leaders have gathered for the memorial service of former South African President Nelson Mandela in Johannesburg.

Nelson Mandela’s official memorial service is being held at Soweto’s FNB stadium in front of a huge crowd.

It is one of the biggest send offs in history.

Dignitaries including President Barack Obama & his wife Michelle, Tony Blair, President Jacob Zuma, David Cameron and more are at the event.