`` We 'll see what the situation is when we land , '' he said en route to Johannesburg . Obama says visiting Mandela will depend on the family 's wishes . Comment: Mandela is a hero to many , the U.S. president says . Obama 's visit will include a stop at Robben Island , where Mandela spent time in prison .
Obama says visiting Mandela will depend on the family 's wishes . Comment: Mandela is a hero to many , the U.S. president says . Obama 's visit will include a stop at Robben Island , where Mandela spent time in prison .