Nelson Mandela memorial service in South Africa

December 9, 2013: This handout image provided by the GCIS is the front page of the programme for the memorial service to late South African president Nelson Mandela. (AP)

Dec. 10, 2013: President Obama, left, and first lady Michelle Obama, right, arrive at Waterkloof Air Base for a memorial service in honor of former South African leader Nelson Mandela in Centurion, South Africa. (AP)

Dec. 9, 2013: Four years old Bokamoso warms her hands over candles placed between flowers outside of the house of former South African President Nelson Mandela in Johannesburg. (AP)

Dec. 10, 2013: People react and gesture in the pouring rain as they arrive for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

Dec. 10, 2013: People hold images of former South African president Nelson Mandela ahead of his memorial service at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

Dec. 10, 2013: A man waves a South African flag as he arrives for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

December 10, 2013: A man takes a photograph of a giant billboard ahead of the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

December 10, 2013: A man distributes copies of the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

December 10, 2013: People sing and dance as they arrive for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

December 10, 2013: People hold up the US flag and portraits of Nelson Mandela before the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

December 10, 2013: South Africa rugby union captain Francois Pienaar waits for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg. (AP)

December 10, 2013: Retired Anglican Archbishop Desmond Tutu, right, arrives with Former U.N. Secretary-General Kofi Annan for the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg.  (AP)

December 10, 2013: Former South African President F. W. De Klerk, right, arrives for the memorial service for former South African president Nelson Mandela. (AP)

December 10, 2013: Winnie Madikizela-Mandela, Nelson Mandela's former wife, listens to speakers during the memorial service. (AP)

December 10, 2013: President Barack Obama waves to the crowd from the stands as he arrives for the memorial service for former South African President Nelson Mandela at the FNB stadium in Johannesburg, South Africa.  (AP)

Dec. 10, 2013: Former U.S. President George W. Bush, left, embraces Irish rock star Bono during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

Dec. 10, 2013: People run in the heavy rain inside the arena during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

Dec. 10, 2013: An image of President Barrack Obama is flashed on a screen as he makes his speech during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto, near Johannesburg, South Africa. (AP)

Dec. 10, 2013: People watch as President Barack Obama speaks to crowds attending the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg. (AP)

Dec. 10, 2013: People look into a tunnel as they wait for the arrival of President Barack Obama during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg. (AP)