Gallery: President Barack Obama in SA

US President Barack Obama and First Lady Michelle Obama are greeted by President Jacob Zuma and his wife, First Lady Thobeka Madiba-Zuma, at the Union Building in Pretoria. Photo: Reuters

South African military personnel roll out the red carpet on the tarmac as US President Barack Obama, first lady Michelle Obama and their daughters arrive at Waterkloof Air Base. Photo: Reuters

US President Barack Obama and first lady Michelle Obama arrive at Waterkloof Air Base. Photo: Reuters

US President Barack Obama waves while arriving at Waterkloof Air Base. Photo: Reuters

US President Barack Obama, middle, and first lady Michelle Obama, right, react as Maite Nkoana-Mashabane, Minister of International Relations and Cooperation, left, gestures during their arrival at Waterkloof Airbase in Pretoria. Photo: AP

SA and US flags around the Union Buildings, in preparation for a working visit by President Obama to the Republic of SA. Photo: GCIS

U.S. President Barack Obama flanked by First Lady Michelle Obama, left, waves with South African President Jacob Zuma, second right, and his wife Tobeka Madiba Zuma, right, on the steps of Union Building in Pretoria, South Africa, Saturday June 29, 2013. (AP Photo/Jerome Delay)

U.S. President Barack Obama and first lady Michelle Obama wave from Air Force One as they depart Dakar, Senegal, June 28, 2013. U.S. President Obama heads to South Africa on Friday hoping to see ailing icon Nelson Mandela, after wrapping up a visit to Senegal that focused on improving food security and promoting democratic institutions. REUTERS/Jason Reed (SENEGAL - Tags: POLITICS)

FILE - This two-picture combination of file photos shows Nelson Mandela on Aug. 8, 2012, left, and President Barack Obama on May 31, 2013. It was as a college student that President Barack Obama began to find his political voice. Inspired by Nelson Mandela’s struggle against South Africa’s apartheid government, the young Obama joined campus protests against the white racist rule that kept Mandela locked away in prison for nearly three decades. Now a historic, barrier-breaking figure himself, Obama will arrive in South Africa Friday to find a country drastically transformed by Mandela’s influence, and a nation grappling with the beloved 94-year-old’s mortality. (AP Photo/File)

President Jacob Zuma hold bilateral talks with his counterpart US President Barack Obama and their delegation at the Union Buildings in Pretoria. President Obama is on an official visit to South Africa to strenghten bilteral relations. 29/06/2013, Elmond Jiyane, GCIS

US President Barack Obama talks with President Jacob Zuma at the Union Building in Pretoria. Photo: AP

US President Barack Obama shakes hands with President Jacob Zuma during their meeting at the Union Buildings in Pretoria. Photo: Reuters

President Jacob Zuma hold bilateral talks with his counterpart US President Barack Obama and their delegation at the Union Buildings in Pretoria. President Obama is on an official visit to South Africa to strenghten bilteral relations. 29/06/2013, Elmond Jiyane, GCIS

US President Barack Obama and President Jacob Zuma address a press conference following their meeting at Union Building in Pretoria. Photo: AP

US President Barack Obama pauses during a joint news conference with President Jacob Zuma at the Union Buildings in Pretoria. Photo: Reuters

A man wears a T-shirt with a portrait of US President Barack Obama. Photo: Reuters

US President Barack Obama arrives at a joint news conference with President Jacob Zuma at the Union Buildings in Pretoria. Photo: Reuters

US President Barack Obama, left, gestures during a news conference with President Jacob Zuma at the Union Buildin in Pretoria. Photo: AP

President Jacob Zuma takes a question at a joint news conference with US President Barack Obama at the Union Building in Pretoria. Reuters

U.S. President Barack Obama listens to South Africa's President Jacob Zuma's remarks at a joint news conference at the Union Building in Pretoria June 29, 2013. REUTERS/Gary Cameron (SOUTH AFRICA - Tags: POLITICS)