A boy with "Rest In Peace Nelson Mandela" painted on his face looks up to the skies 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. (AP Photo/Peter Dejong)
A couple sits under umbrellas in the rain and clean a poster of former South Africa President Nelson Mandela with a towel before the memorial service for Mandela at the FNB Stadium in the Johannesburg, South Africa township of Soweto, Tuesday Dec. 10, 2013. (AP Photo/Markus Schreiber)
South Africans attend the memorial service for the late South African president Nelson Mandela at FNB Stadium on December 10, 2013 in Johannesburg. (Erhan Sevenler/Anadolu Agency/Getty Images)
A sea of umbrellas in the arena as rain lashes down 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. (AP Photo/Tsvangirayi Mukwazhi)
U.S. President Barack Obama (L) shakes hands with Cuban President Raul Castro during the official memorial service for former South African President Nelson Mandela at FNB Stadium December 10, 2013 in Johannesburg, South Africa. (Chip Somodevilla/Getty Images)
A mourner poses with his homemade hat before the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013. (AP Photo/Muhammed Muheisen)
People attending Nelson Mandela's public Memorial Service at the FNB stadium on December 10, 2013, in Johannesburg, South Africa. (Nelius Rademan/Foto24/Gallo Images/Getty Images)
A girl waves a South African flag while watching the official memorial service for Nelson Mandela on a large screen inside the Orlando Stadium in Soweto, on December 10, 2013 in Johannesburg, South Africa. (Dan Kitwood/Getty Images)
US President Barack Obama pauses while speaking during the memorial service for late South African President Nelson Mandela at Soccer City Stadium in Johannesburg on December 10, 2013. (BRENDAN SMIALOWSKI/AFP/Getty Images)
Emily Isaacs and Tshidiso Mashilo were part of thousands that gathered at the FNB stadium for the memorial service of former president Nelson Mandela in Johannesburg. (LAUREN MULLIGAN © THE TIMES)
A man holds the official programme ahead of the memorial service for former South African president Nelson Mandela at the FNB Stadium in the Johannesburg, South Africa township of Soweto, Tuesday, Dec. 10, 2013. (AP Photo/Peter Dejong)