Jacob Zuma, President of the Republic of South Africa, signs the guest book at the United Nations Headquarters September 18, 2016, in New York. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images

Jacob Zuma(R), President of the Republic of South Africa, meets with UN Secretary-General Ban Ki-moon at United Nations Headquarters, September 18, 2016, in New York. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images

Jacob Zuma, President of the Republic of South Africa, meets with UN Secretary-General Ban Ki-moon at the United Nations Headquarters September 18, 2016, in New York. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore - 18/9/16. Mercedes' Nico Rosberg of Germany celebrates after winning the race. REUTERS/Jeremy Lee

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore- 18/9/16 Mercedes' Nico Rosberg of Germany celebrates winning the race. REUTERS/Edgar Su

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore- 18/9/16 Mercedes' Nico Rosberg of Germany celebrates winning the race with teammates. REUTERS/Edgar Su

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore- 18/9/16 Mercedes' Nico Rosberg of Germany celebrates winning the race. REUTERS/Edgar Su

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore- 18/9/16 Mercedes' Nico Rosberg of Germany and Mercedes' Lewis Hamilton of Britain celebrate. REUTERS/Edgar Su