The Scotsman cartoon: Nelson Mandela memorial Nelson Mandela was remembered by tens of thousands of spectators and heads of state from around the world in South Africa. US president Barack Obama led the tributes urging the world to use the celebration of his life as a period of "self-reflection." The US president spoke of the "heroic" life of the South African anti-apartheid hero describing him as the "last great liberator of the 20th century" as he addressed thousands gathered for the memorial service to Mr Mandela in the FNB Stadium in Soweto. Obama: "Mandela makes me want to be a better man" Mandela: Cameron and Obama selfie goes viral