A giant portrait of former president Nelson Mandela, center right, adorns a cooling tower of a now defunct power station in Soweto, South Africa, Monday, Dec 10, 2012. Mandela underwent more ... more 
A giant portrait of former president Nelson Mandela, center right, adorns a cooling tower of a now defunct power station in Soweto, South Africa, Monday, Dec 10, 2012. Mandela underwent more unspecified medical tests in a military hospital in Pretoria, South Africa, as the public and journalists outside continued to ask the same as of yet unanswered questions: What, if anything, is wrong with the 94-year-old anti-apartheid icon. (AP Photo/Denis Farrell) less 
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Associated Press | Photo By Denis Farrell
Mon, Dec 10, 2012 11:25 AM EST