People sing the South African national anthem outside its mission to the United Nations in memoriam of the late Nelson Mandela in New York December 6, 2013. South African anti-apartheid hero Mandela died aged 95 at his Johannesburg home on Thursday after a prolonged lung infection, plunging his nation and the world into mourning for a man hailed by global leaders as a moral giant. REUTERS/Carlo Allegri (UNITED STATES - Tags: POLITICS OBITUARY)