U.S. President Barack Obama, right, and first lady Michelle Obama write in a guest book after touring Robben Island, the historic Apartheid-era prison that held former South African president and ... more 
U.S. President Barack Obama, right, and first lady Michelle Obama write in a guest book after touring Robben Island, the historic Apartheid-era prison that held former South African president and anti-apartheid hero Nelson Mandela, Sunday, June 30, 2013, in Robben Island, South Africa. (AP Photo/Evan Vucci) less 
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Associated Press | Photo By Evan Vucci
Sun, Jun 30, 2013 5:54 PM EDT