Shugaba Obama ya ziyarci gidan kason da aka tsare Nelson Mandela

President Obama walks into a cell block during a tour of Robben Island.

Malia Obama, Sasha Obama, first lady Michelle Obama, and Ahmed Kathrada a former prisoner with Mandela, stand in the courtyard of the prison on Robben Island.

President Obama, his daughter Sasha Obama, and Ahmed Kathrada a former prisoner with Mandela, walk through the courtyard of the prison on Robben Island.

Ahmed Kathrada, a former prisoner with Nelson Mandela, guides Barack Obama through Robben Island prison, South Africa

President Obama walks from Mandela's prison cell No. 5, on Robben Island.

President Obama looks out from Mandela's prison cell on Robben Island, South Africa.

Barack Obama looks out from Mandela's former cell No. 5, on Robben Island, South Africa.

U.S. President Barack Obama looks out from Section B, prison cell No. 5, on Robben Island, South Africa.

President Obama and Michelle Obama sign a guest book during a tour of Robben Island.