South Africa

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Former U.S. President Bill Clinton and Former U.S. President George W. Bush, right, wave while Chelsea Clinton walks past during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013. (AP Photo/Matt Dunham)

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Former U.S. President Bill Clinton gestures during the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013. (AP Photo/Matt Dunham)

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President Barrack Obama acknowledges applause before speaking at the memorial service for former South African president Nelson Mandela at the FNB Stadium in Soweto near Johannesburg, Tuesday, Dec. 10, 2013. (AP Photo/Matt Dunham)