A South African Police Service forensic officer digs up a grave for the exhumation of two bodies that are believed to be those of young activists at Avalon Cemetery in Johannesburg on Tuesday, March 12, 2013. Authorities believe the bodies are those of two young activists last seen 24 years ago at the home of Winnie Madikizela-Mandela. (AP Photo/Themba Hadebe)

Photo by: Themba Hadebe

A South African Police Service forensic officer digs up a grave for the exhumation of two bodies that are believed to be those of young activists at Avalon Cemetery in Johannesburg on Tuesday, March 12, 2013. Authorities believe the bodies are those of two young activists last seen 24 years ago at the home of Winnie Madikizela-Mandela. (AP Photo/Themba Hadebe)