U.S. President Obama and the First Lady are greeted by South Africa's President Zuma and his wife at...
U.S. President Barack Obama (bottom L) and First Lady Michelle Obama (bottom R) are greeted by South Africa's President Jacob Zuma (top L)and his wife, First Lady Thobeka Madiba-Zuma (top right), at the Union Building in Pretoria June 29, 2013. Obama paid tribute to anti-apartheid hero Nelson Mandela as he flew to South Africa on Friday but played down expectations of a meeting with the ailing black leader during an Africa tour promoting democracy and food security. REUTERS/Gary Cameron (SOUTH AFRICA - Tags: POLITICS)