Obama tells students , `` The world will be watching what decisions you make '' Mandela urges Obama to close Obama , find Obama peace . Access to electricity `` fundamental to opportunity , '' president says . Obama and family tour the United States , where Tutu was held .
Obama tells students , `` The world will be watching what decisions you make '' Tutu urges Obama to close Guantanamo Bay , find Mideast peace . Access to electricity `` fundamental to opportunity , '' president says . Obama and family tour Robben Island , where Mandela was held .