Nelson Mandela Memorial at Soweto Stadium

Two girls dance in the rain outside of the the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa, Tuesday Dec. 10, 2013.

President Obama speaks

President Barack Obama waves as he arrives to speak to crowds attending the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Charlize Theron and Bono

Actress Charlize Theron speaks with musician Bono before the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Portrait of Madiba

A portrait of Nelson Mandela is seen through a sea of umbrellas during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa, Tuesday Dec. 10, 2013.

Hamid Karzai greets Pranab Mukherjee

Afghanistan President Hamid Karzai, left, shakes hands with India’s President Pranab Mukherjee as Sonia Gandhi looks on during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Desmond Tutu addresses crowd

Retired Anglican Archbishop Desmond Tutu speaks at the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

President Obama hugs President Zuma

U.N. Secretary General Ban Ki-moon, left, watches as President Barack Obama hugs South African President Jacob Zuma, right during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

France's Hollande and Sarkozy

French President Francois Hollande, centre, sits with his companion, Valerie Trierweller and former French President Nicolas Sarkozy, left, during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa, Tuesday Dec. 10, 2013.

Princess Letizia of Spain and Laura Bush

Princess Letizia of Spain, center, speaks with Laura Bush and Former U.S. President George W. Bush during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

The Bush's and Clinton's

From left, Former U.S. Secretary of State Hillary Rodham Clinton, Laura Bush, Former U.S. President Bill Clinton and Former U.S. President George W. Bush listen to speakers during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Winnie Madikizela-Mandela kisses Desmond Tutu

Winnie Madikizela-Mandela, Nelson Mandela's former wife, kisses Retired Anglican Archbishop Desmond Tutu during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Gordon Brown arrives

Former British Prime Minister Gordon Brown arrives for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Former U.S. President Bill Clinton greets former Colombian President Andrés Pastrana

Former U.S. President Bill Clinton, right, greets, Former Colombian President Andrés Pastrana before the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

Historic handshake

President Barack Obama shakes hands with Cuban President Raul Castro at the FNB Stadium in Soweto, South Africa, in the rain for a memorial service for former South African President Nelson Mandela, Tuesday Dec. 10, 2013. The handshake between the leaders of the two Cold War enemies came during a ceremony that's focused on Mandela's legacy of reconciliation.

Desmond Tutu and Bono

Retired Anglican Archbishop Desmond Tutu and musician Bono wave to mourners during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.

President Obama greets Dilma Rousseff

In this TV image,President Barack Obama hugs Brazil's President Dilma Rousseff at the FNB Stadium in Soweto, South Africa, in the rain for a memorial service for former South African President Nelson Mandela, Tuesday Dec. 10, 2013.

Winnie Madikizela-Mandela

Winnie Madikizela-Mandela, Nelson Mandela's former wife, listens to speeches during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013.