President Obama Visits Africa

U.S. President Barack Obama writes in a guest book as he tours Robben Island with first lady Michelle Obama, near Cape Town, June 30, 2013.

U.S. President Barack Obama departs the Robben Island prison cell where Nelson Mandela spent 18 of his 27 years of imprisonment near Capetown, June 30, 2013.

U.S. President Barack Obama listens to Desmond Tutu as he visits his HIV Foundation Youth Centre and takes part in a health event in Cape Town, June 30, 2013.

U.S. President Barack Obama shares a moment with South African first lady Thobeka Madiba-Zuma during an official dinner at the presidential guest house in Pretoria, June 29, 2013.

U.S. President Barack Obama greets participants at a town hall-style meeting with young African leaders at the University of Johannesburg in Soweto, June 29, 2013.

Members of the White House travelling staff walk to a group of helicopters about to transport U.S. President Barack Obama from a soccer field in Johannesburg, June 29, 2013.

Protesters argue with police outside the University of Johannesburg in Soweto, ahead of a visit by U.S. President Barack Obama, June 29, 2013.

U.S. President Barack Obama and first lady Michelle Obama look out of a doorway that slaves departed from on Goree Island, Senegal, June 27, 2013.

U.S. President Barack Obama visits a food security expo in Dakar, Senegal, June 28, 2013.

U.S. President Barack Obama poses for a picture with his wife Michelle Obama and Senegalese President Macky Sall and his wife Mariame Faye Sall, at the presidential palace in Dakar, Senegal, June 27, 2013.

People line the motorcade route of U.S. President Barack Obama on his way to meet with Senegalese President Macky Sall in Dakar, June 27, 2013.

U.S. President Barack Obama is welcomed by a Senegalese honor guard as he arrives at the presidential palace in Dakar, Senegal, June 27, 2013.