Nelson Mandela, who died December 5, 2013, was mourned worldwide as the leader who beat Apartheid and then worked to promote reconciliation and racial tolerance in South Africa. But 23 years ago, just months after he was freed from a South African prison, Mandela created a sensation--and some tense, discomforting moments--when he visited the U.S. and met with then-President George H. W. Bush at the White House.