Nelson Mandela memorial service in South Africa (15 images)

U.S. President Barack Obama speaks at the memorial service for former South African President and anti-apartheid leader Nelson Mandela, at FNB Stadium in Johannesburg, South Africa on December 10, 2013. Nearly 100 heads of state and roughly 100,000 mourners attended the service for Mandela who died last week at the age of 95. UPI/Jemal Countess

Former United States Presidents George Bush and Bill Clinton (R) are seen at the memorial service for former South African President and anti-apartheid leader Nelson Mandela at FNB Stadium in Johannesburg, South Africa, on December 10, 2013. Nearly 100 heads of state and roughly 100,000 mourners attended the service for Mandela, who died last week at the age of 95. UPI/Jemal Countess

Former United States Presidents George Bush and Bill Clinton (R) are seen with former Secretary of State Hillary Clinton (L) and former first lady Laura Bush at the memorial service for former South African President and anti-apartheid leader Nelson Mandela at FNB Stadium in Johannesburg, South Africa, on December 10, 2013. Nearly 100 heads of state and roughly 100,000 mourners attended the service for Mandela, who died last week at the age of 95. UPI/Jemal Countess

A man waves a flag of South Africa during the memorial service for former South African President and anti-apartheid leader Nelson Mandela, at FNB Stadium in Johannesburg, South Africa, December 10, 2013. Nearly 100 heads of state and roughly 100,000 mourners attended the service for Mandela who died last week at the age of 95. UPI/Jemal Countess