US First Lady Michelle Obama begins a six-day visit to southern Africa on Monday where she will meet anti-apartheid leaders and highlight the spread of democracy on the continent. The wife of US President Barack Obama will visit the South African cities of Pretoria, Johannesburg and Cape Town and the Botswana capital, Gaborone, starting on Monday evening, June 20 through Sunday, June 26. She will be accompanied by her two daughters, Malia and Sasha, but not her husband, on a trip that the White House says will focus on 'youth leadership, education, health and wellness.' The first lady will also be travelling with her mother, Marian Robinson, and two nephews. She will visit several places that are symbols of South Africa's decades-long anti-apartheid struggle, according to a schedule put out by the White House. After meeting Nompumelelo Ntuli-Zuma, the wife of South African president Jacob Zuma, on Tuesday, Mrs Obama will visit the Nelson Mandela Foundation in Johannesburg, where she will be given a tour by Graca Machel, the former first lady of Mozambique and now wife of former South African president Nelson Mandela. There were no plans announced to visit Mr Mandela, who at 92 is in fragile health, although the White House has left open the possibility of a meeting.