In this photo provided by the Nelson Mandela Foundation on Tuesday, June 21, 2011, US First Lady Michelle Obama, left, with former South African President Nelson Mandela, at this home, in Houghton, South Africa. First lady Michelle Obama and her family met with Nelson Mandela during a private visit at the former South African president's home. Mrs. Obama, daughters Malia and Sasha, and her mother, Marian Robinson, were viewing some of Mandela's personal papers at his foundation Tuesday when according to White House officials, he sent word that he wanted to meet them. It was Mrs. Obama's first meeting with the prisoner-turned-president. (AP Photo/ Debbie Yazbek, Nelson Mandela Foundation)