President Barack Obama and First Lady Michelle Obama, along with daughters Sasha and Malia, stand in former South African President Nelson Mandela’s cell as they listen to former prisoner Ahmed Kathrada during their tour of Robben Island Prison on Robben Island in Cape Town, South Africa, June 30, 2013. Leslie Robinson is pictured at left.

President Barack Obama and First Lady Michelle Obama, along with daughters Sasha and Malia, stand in former South African President Nelson Mandela's cell as they listen to former prisoner Ahmed Kathrada during their tour of Robben Island Prison on Robben Island in Cape Town, South Africa, June 30, 2013. Leslie Robinson is pictured at left.